https://18ksolidgold.com/journal/ 2026-10-27T12:00:00+00:00 weekly 0.9 https://18ksolidgold.com/wp-content/uploads/shared_catalog/journal/swiss-st-bernard-poincon-au750-hallmark-guide.jpg 18K SOLID GOLD — Horological Research Journal Laboratory-verified solid 18K gold Au750 and Pt950 horological research monographs by 18K SOLID GOLD https://18ksolidgold.com/journal/swiss-st-bernard-poincon-au750-hallmark-guide/ 2026-10-19T14:15:00+00:00 weekly 0.88 https://18ksolidgold.com/wp-content/uploads/shared_catalog/journal/swiss-st-bernard-poincon-au750-hallmark-guide.jpg Swiss St. Bernard Poincon & Au750 Gold Hallmarks Guide | 18K SOLID GOLD Macro view through a jeweler loupe of a deep-struck Swiss St. Bernard dog head and Au750 hallmark on a solid 18K yellow gold watch lug https://18ksolidgold.com/wp-content/uploads/shared_catalog/v17_wm_solidgold/w35_1_liupwsophsvh1.jpg Rolex Cosmograph Daytona John Mayer Emerald Green Dial 18K Yellow Gold Ref. 116508 (Ref. 116508) — 216.5g | 18K SOLID GOLD Rolex Cosmograph Daytona John Mayer Emerald Green Dial 18K Yellow Gold Ref. 116508 — Verified Mettler-Toledo Mass 216.5g in Solid 18K Gold Au750 / Pt950 (Swiss St. Bernard Poincon & Au750 Gold Hallmarks Guide) https://18ksolidgold.com/wp-content/uploads/shared_catalog/v17_wm_solidgold/w35_5_wga70tophsvh1.jpg Rolex Cosmograph Daytona John Mayer Emerald Green Dial 18K Yellow Gold Ref. 116508 (Ref. 116508) — 216.5g | 18K SOLID GOLD Rolex Cosmograph Daytona John Mayer Emerald Green Dial 18K Yellow Gold Ref. 116508 — Verified Mettler-Toledo Mass 216.5g in Solid 18K Gold Au750 / Pt950 (Swiss St. Bernard Poincon & Au750 Gold Hallmarks Guide) https://18ksolidgold.com/wp-content/uploads/shared_catalog/v17_wm_solidgold/w35_8_rmd5etophsvh1.jpg Rolex Cosmograph Daytona John Mayer Emerald Green Dial 18K Yellow Gold Ref. 116508 (Ref. 116508) — 216.5g | 18K SOLID GOLD Rolex Cosmograph Daytona John Mayer Emerald Green Dial 18K Yellow Gold Ref. 116508 — Verified Mettler-Toledo Mass 216.5g in Solid 18K Gold Au750 / Pt950 (Swiss St. Bernard Poincon & Au750 Gold Hallmarks Guide) https://18ksolidgold.com/journal/18k-yellow-everose-white-gold-alloy-metallurgy-comparison/ 2026-10-21T10:40:00+00:00 weekly 0.88 https://18ksolidgold.com/wp-content/uploads/shared_catalog/journal/18k-yellow-everose-white-gold-alloy-metallurgy-comparison.jpg 18K Yellow, Everose & White Gold Watch Alloy Metallurgy | 18K SOLID GOLD Three solid 18K gold luxury watch cases in yellow gold, Everose pink gold, and warm white gold beside pure gold granules and platinum pellets https://18ksolidgold.com/wp-content/uploads/shared_catalog/v17_wm_solidgold/w185_1_vbl4r3g3d4bh1.jpg Rolex Day-Date 40 18K Yellow Gold Ref. 228238 (Ref. 228238) — 210.2g | 18K SOLID GOLD Rolex Day-Date 40 18K Yellow Gold Ref. 228238 — Verified Mettler-Toledo Mass 210.2g in Solid 18K Gold Au750 / Pt950 (18K Yellow, Everose & White Gold Watch Alloy Metallurgy) https://18ksolidgold.com/wp-content/uploads/shared_catalog/v17_wm_solidgold/w9_1_72hzk712hsvh1.jpg Rolex Day-Date 40 60th Anniversary Olive Green Dial 18K Everose Gold Ref. 228235 (Ref. 228235) — 210.1g | 18K SOLID GOLD Rolex Day-Date 40 60th Anniversary Olive Green Dial 18K Everose Gold Ref. 228235 — Verified Mettler-Toledo Mass 210.1g in Solid 18K Gold Au750 / Pt950 (18K Yellow, Everose & White Gold Watch Alloy Metallurgy) https://18ksolidgold.com/wp-content/uploads/shared_catalog/v17_wm_solidgold/w125_1_40bu28rduvjh1.jpg Rolex Cosmograph Daytona 18K White Gold Ref. 126509 (Ref. 126509) — 216.7g | 18K SOLID GOLD Rolex Cosmograph Daytona 18K White Gold Ref. 126509 — Verified Mettler-Toledo Mass 216.7g in Solid 18K Gold Au750 / Pt950 (18K Yellow, Everose & White Gold Watch Alloy Metallurgy) https://18ksolidgold.com/journal/solid-au750-gold-vs-pvd-gold-plated-watches-weight-test/ 2026-10-23T16:05:00+00:00 weekly 0.88 https://18ksolidgold.com/wp-content/uploads/shared_catalog/journal/solid-au750-gold-vs-pvd-gold-plated-watches-weight-test.jpg Solid Au750 Gold vs. PVD Plated Watches: Gram Weight Proof | 18K SOLID GOLD Solid 18K yellow gold chronograph luxury watch weighed inside a precision Mettler-Toledo analytical balance next to a gold bullion bar https://18ksolidgold.com/wp-content/uploads/shared_catalog/v17_wm_solidgold/w761_1_rdfm3l4gjl7f1.jpg Rolex Submariner Date Graduated Royal Blue Sunburst Dial 18K White Gold Ref. 126619LB (Ref. 126619LB) — 227.4g | 18K SOLID GOLD Rolex Submariner Date Graduated Royal Blue Sunburst Dial 18K White Gold Ref. 126619LB — Verified Mettler-Toledo Mass 227.4g in Solid 18K Gold Au750 / Pt950 (Solid Au750 Gold vs. PVD Plated Watches: Gram Weight Proof) https://18ksolidgold.com/wp-content/uploads/shared_catalog/v17_wm_solidgold/w610_1_tswq43xiebqf1.jpg Rolex GMT-Master II 18K Everose Gold Deep Crystal Optics Ref. 126715CHNR (Ref. 126715CHNR) — 225.8g | 18K SOLID GOLD Rolex GMT-Master II 18K Everose Gold Deep Crystal Optics Ref. 126715CHNR — Verified Mettler-Toledo Mass 225.8g in Solid 18K Gold Au750 / Pt950 (Solid Au750 Gold vs. PVD Plated Watches: Gram Weight Proof) https://18ksolidgold.com/wp-content/uploads/shared_catalog/v17_wm_solidgold/w14_6_k9x8utljcjvh1.jpg Rolex Submariner Date 41mm Bluesy Royal Blue Dial & Bezel 18K Yellow Gold Ref. 126618LB (Ref. 126618LB) — 227.2g | 18K SOLID GOLD Rolex Submariner Date 41mm Bluesy Royal Blue Dial & Bezel 18K Yellow Gold Ref. 126618LB — Verified Mettler-Toledo Mass 227.2g in Solid 18K Gold Au750 / Pt950 (Solid Au750 Gold vs. PVD Plated Watches: Gram Weight Proof) https://18ksolidgold.com/journal/patek-philippe-nautilus-aquanaut-18k-rose-gold-weight-index/ 2026-10-25T11:30:00+00:00 weekly 0.88 https://18ksolidgold.com/wp-content/uploads/shared_catalog/journal/patek-philippe-nautilus-aquanaut-18k-rose-gold-weight-index.jpg Patek Philippe Nautilus & Aquanaut 18K Rose Gold Gram Index | 18K SOLID GOLD Macro studio portrait of a solid 18K rose gold Patek Philippe Nautilus with brown sunburst dial and sapphire caseback showing the 21K gold rotor https://18ksolidgold.com/wp-content/uploads/shared_catalog/v17_wm_solidgold/w23_1_tsbp744u9esh1.jpg Patek Philippe Nautilus 40mm Graduated Chocolate Brown Dial 18K Rose Gold Ref. 5711/1R-001 (Ref. 5711/1R-001) — 186.5g | 18K SOLID GOLD Patek Philippe Nautilus 40mm Graduated Chocolate Brown Dial 18K Rose Gold Ref. 5711/1R-001 — Verified Mettler-Toledo Mass 186.5g in Solid 18K Gold Au750 / Pt950 (Patek Philippe Nautilus & Aquanaut 18K Rose Gold Gram Index) https://18ksolidgold.com/wp-content/uploads/shared_catalog/v17_wm_solidgold/w89_1_sa1oryu9znoh1.jpg Patek Philippe Nautilus Moonphase & Power Reserve 18K Rose Gold Ref. 5712/1R-001 (Ref. 5712/1R-001) — 186.2g | 18K SOLID GOLD Patek Philippe Nautilus Moonphase & Power Reserve 18K Rose Gold Ref. 5712/1R-001 — Verified Mettler-Toledo Mass 186.2g in Solid 18K Gold Au750 / Pt950 (Patek Philippe Nautilus & Aquanaut 18K Rose Gold Gram Index) https://18ksolidgold.com/wp-content/uploads/shared_catalog/v17_wm_solidgold/w735_1_3v40mu8yruye1.jpg Patek Philippe Aquanaut Extra-Large Self-Winding 18K Rose Gold Master Watchmaker Spec Ref. 5167R (Ref. 5167R) — 108.6g | 18K SOLID GOLD Patek Philippe Aquanaut Extra-Large Self-Winding 18K Rose Gold Master Watchmaker Spec Ref. 5167R — Verified Mettler-Toledo Mass 108.6g in Solid 18K Gold Au750 / Pt950 (Patek Philippe Nautilus & Aquanaut 18K Rose Gold Gram Index) https://18ksolidgold.com/journal/pt950-platinum-ice-blue-dial-horology-density-collectors-guide/ 2026-10-26T17:20:00+00:00 weekly 0.88 https://18ksolidgold.com/wp-content/uploads/shared_catalog/journal/pt950-platinum-ice-blue-dial-horology-density-collectors-guide.jpg Pt950 Platinum Ice-Blue Dial Watches: Density & Mass Guide | 18K SOLID GOLD Macro studio portrait of a 950 platinum Rolex Daytona Platona with an ice-blue dial, baguette diamond markers, and chestnut brown ceramic bezel https://18ksolidgold.com/wp-content/uploads/shared_catalog/v17_wm_solidgold/w12_1_cckmr1fdfjvh1.jpg Rolex Cosmograph Daytona Platona Ice-Blue Baguette Diamond Dial 950 Platinum Ref. 116506 (Ref. 116506) — 282.0g | 18K SOLID GOLD Rolex Cosmograph Daytona Platona Ice-Blue Baguette Diamond Dial 950 Platinum Ref. 116506 — Verified Mettler-Toledo Mass 282.0g in Solid 18K Gold Au750 / Pt950 (Pt950 Platinum Ice-Blue Dial Watches: Density & Mass Guide) https://18ksolidgold.com/wp-content/uploads/shared_catalog/v17_wm_solidgold/w108_2_h5jr5cyjs0mh1.jpg Rolex Cosmograph Daytona 950 Platinum Ref. 116506 (Ref. 116506) — 282.1g | 18K SOLID GOLD Rolex Cosmograph Daytona 950 Platinum Ref. 116506 — Verified Mettler-Toledo Mass 282.1g in Solid 18K Gold Au750 / Pt950 (Pt950 Platinum Ice-Blue Dial Watches: Density & Mass Guide) https://18ksolidgold.com/wp-content/uploads/shared_catalog/v17_wm_solidgold/w88_1_7peva3he0ooh1.jpg Rolex Day-Date 40 Diamond-Set Bezel 950 Platinum Ref. 228396TBR (Ref. 228396TBR) — 280.6g | 18K SOLID GOLD Rolex Day-Date 40 Diamond-Set Bezel 950 Platinum Ref. 228396TBR — Verified Mettler-Toledo Mass 280.6g in Solid 18K Gold Au750 / Pt950 (Pt950 Platinum Ice-Blue Dial Watches: Density & Mass Guide)