I got this yesterday:
It was described as not running - but its running fine and keeping decent time. I've given it a new strap and crystal.
Anyway, the movement has the number 930 under the balance, but nothing else and I can't ID it. So any help appreciated.
Interestingly, it also has engravings from Silver & Co. on the movement and inside the case back.
I thought that this must be from the time after the US FTC required the country of origin for imports into the USA to be shown in English. So 'Fab. Suisse' wasn't good enough, and Swiss had to be added - as well as 'unadjusted' and 'fifteen'. BUT there was a British Silver and Co. E. Silver and Co so I'm not so sure.
Polar is most likely a brand of Juvenia Mikrolisk - was Feines für die Tasche... - Das Informationsportal rund um die Taschenuhr!
I bought it 'cos I liked the dial - but its almost impossible to see the hands against the patinated grey dial.