Prewar movements were often designed to fit in the rectangular cases that were in fashion then. The war made round watches fashionable (because all military watches were round). So inside 1940s watches you sometimes find this:
පෝස්ටුව
වියාචනය: තෙවන පාර්ශ්වීය අදහස් ඇතුළත් වේ. උපදෙස් නොවේ. සහතිකයක් නොමැතිව Binance AI භාවිත කළ හැකි ය. See T&Cs.