And now for something completely different. Bought this one today.
A Minerva Chronograph ref 1335 Caliber 13-20CH. 35mm case. Serial 710xxx.
View attachment 151642
From WatchWiki:
Introduced in 1923 in Minerva-brand chronographs, Calibre 13-20 was designed as a mono pusher but was available after 1940 in bi-pusher configurations with 30- or 45-minute counters. It was one of the few chronograph calibres on the market on its introduction and was developed in collaboration with Dubois-Depraz. It was remarkably well-developed for the era and continued in production for decades.
Watch enthusiasts are able to recognize Minerva's Calibre 13 by the unusual positions of the pushers: Rather than being located between the crown and lugs at 30°, they are moved toward the lugs at 37° from the crown. Calibre 13 is a column-wheel chronograph, 6.4 mm thick, with a Breguet balance spring and 17 jewels.
Even after the introduction of the updated 13-21 derivative, Minerva continued occasionally to produce (or re-manufacture) Calibre 13-20 movements. For example, Panerai used a re-finished Calibre 13-20 in their Panerai Ferrari 00024 chronograph, branding it "Panerai OP XXVIII". Panerai also used this as their OP XXV in the 2011 PAM300 Mare Nostrum, though perhaps this was the later 13-22 instead.
Not my picture/watch, but the movement in mine is fully signed and in the same execution as this one:
![[IMG]](proxy.php?image=http%3A%2F%2Fwww.urdelar.se%2Fimage%2Fcache%2Fdata%2Fminerva%2Fminerva13_20_1-600x600.jpg&hash=0a1bfe52e3fa4d6078545473cb62991e)
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