This is an antique Segal padlock lock that has 2 working keys. The lock weighs about 1.5 lbs and measures 4.5" X 2.5".Very nice vintage padlock that also displays nice and is worth the price for the padlock aspect alone not to mention the collectible value of such a nice piece. - eBay
This kind of follows the Scandinavian style padlock using a modern type key.
These seems to be very affordable with this lock going for only $26.22 (Plus $10 shipping)-----