Grand Seiko "Ushio" UFA 300 Diver - Sized Right or Still Not Quite?! - Worth The Hype?! Episode #56
My Watches PodcastShow Notes
The Grand Seiko “Ushio” UFA 300 Diver is a professional dive watch housed in a 40.8 mm titanium case measuring 12.9 mm thick, paired with a ceramic bezel, sapphire crystal, and 300 m water resistance. It is powered by the new Spring Drive Calibre 9RB1, an automatic movement delivering 72 hours of power reserve and an exceptional ±20 seconds per year accuracy, earning the “U.F.A.” (Ultra Fine Accuracy) designation.
The watch is available in blue or green, with large Lumibrite-filled hands and indices following the Evolution 9 design language. The titanium bracelet also comes with a micro-adjustment and a wetsuit extension,.
More from My Watches Podcast
The MING × Massena LAB 57.09 Secret Honey combines MING’s contemporary design with the honey-toned vintage-dial inspiration of their earlier 17.09 collaboration. Its 40mm Grade 5 titanium case measures 10.17mm thick, 47.8mm lug-to-lug, and offers 100m water resistance, with contrasting gold- and rose-gold-tone coatings on the stepped lugs.
The Rolex Explorer 36mm is a time-only sports watch rooted in Rolex’s association with mountaineering and exploration, with its distinctive black dial featuring the 3-6-9 Arabic numerals and Mercedes-style hour hand.
The TENNET Argonaut is a Singapore-designed dive watch with a 40mm 904L stainless-steel case, 48mm lug-to-lug, 12mm thick, and 300m/30ATM water resistance rating. It uses a double-domed sapphire crystal with internal AR coating, a 120-click unidirectional aluminium bezel, screw-down crown and caseback, and a 20mm stainless-steel bracelet with micro-adjustment.
The H. Moser & Cie. Off-Grid measures 42.6mm in diameter and 14.4mm thick, with a steel case, composite elements, sapphire crystals and 12 ATM (120m) water resistance. At its heart is the D10 calibre, developed with Sequent, measuring 32.5 × 33.9 × 6.9mm, operating at 32,768 Hz and offering analogue hours and minutes alongside a digital display for the additional functions.
The 2026 Rolex Perpetual Padellone is a modern revival of the vintage Ref. 8171 “Padellone,” combining a 39mm 18K Everose gold or 950 platinum case with a complete annual calendar and moonphase display. Its new Calibre 7190 runs at 5Hz, uses Rolex’s Dynapulse escapement, and delivers around 66 hours of power reserve.