Got this off ebay for £3.20 - not working.
Its a Polo Calendographe pointer date watch - which I'd not heard of.
The movement is a Lorsa 237 - I'm not sure which variant as this one
has a calendar but also a push button - which mine hasn't.
Note the dial reference to 'Super Shock-Resist - which can be seen here:
The balance seems ok, but the mainspring is knackered. Unfortunately, 2 of the spring bar holes in the lugs have worn through to the outside - so a strap wouldn't be very secure without a bit of engineering.
Its quite big - at 35mm across without the crown.
Anyway, a fairly rare French piece methinks.
There's another one here:
but its inferior as it doesn't have Super Shock-Resist.