This Roamer today, just picked it up from my Watchmaker after a lens change, represents Roamers last in-house calibre, whilst only 17 jewels boasts separate day date quick adjust, hacking and a micro adjust regulator and completes my line up of Roamer MST520, 521, 522 and this one 523.
Still on a very old Pig Skin period strap that must have replaced the original some decades ago.
Roamer SEAROCK Ref Mod 523-2210.325