Unusual Verdun pin key padlock from Hungary

[Huw Eastwood]

Had this one for years- have never seen another one, but I'm guessing there must be plenty of them out there.



Has a serial number 8537 on the side and shackle, and the body is marked:
PATENT
SERIE 0
KATZKY RT
VERDUN MUVEK RT
MADE IN HUNGARY

Don't think this keys original as the couple of pics I found on the net shows a more basic but practical flat strip key with a hole for attachment- this ones been nicely made and matches the steel and shape of the padlock body, but has no provision for carrying.