Seiko-Prospex Sea SPB383 31 mm and tri-fold push button release

and tri-fold push button release clasp with secure lock and extender

Thickness: 12

Three platinum-coated rings embossed with the Montblanc brand name and a platinum-coated clip with individual serial number emphasize the timeless design of this fine ballpoint pen

the watch is driven by the OMEGA Co-Axial Master Chronometer Calibre 8912

” the Meisterstück has become the symbol for high quality luxury writing

Seiko-Prospex Sea SPB383 31 mm and tri-fold push button releaseCaliber Number 6R54 Movement Type Automatic with manual winding Precision +25 to 15 seconds per day Power reserve Approx. 72 hours(3 days) Jewels 24 Functions 24 hour hand Stop second hand function Case Band Case Material Stainless steel (super hard coating) Case Size Thickness: 12. 9mm Diameter: 42. 0mm Lug to lug: 48. 6mm Crystal Sapphire crystal Crystal Coating Anti reflective coating on inner surface LumiBrite LumiBrite on hands, index(es) and