Need help identifying old Junkunc Bros padlock

[Klaiviel]

Hey so I picked up a new padlock and I would like to find out more about it. It says on it Junkunc Bros successors to American Lock Company. It also mentions grip tumblers. The key is double sided and the bitting is different on each side. The part I am confused about is when I looked up the Junkunc brothers I found out they didn't make locks until 1920's yet the lock is stamped 1855. Any idea why this might be and what year it may actually be from?

[Raymond]

The "grip" style padlocks were made in the 1920s or later. The number 1855 is a specific key code.

I have drawings from the REED code book but there are several pages of extremely fine print. Put in a photo when you can.

Very lucky find.

[Klaiviel]

Cool, good to know. Here are some pictures. Has both the original keys.

[David Swearingen]

VERY good find; that's the oldest Junkunc/American I've ever seen with a restricted keyway.

[thelockpickkid]

VERY good find; that's the oldest Junkunc/American I've ever seen with a restricted keyway.

What makes you think this is a restricted keyway??

[awol70]

wow! green with envy.
beautiful old lock.
you are lucky.

[David Swearingen]

VERY good find; that's the oldest Junkunc/American I've ever seen with a restricted keyway.

What makes you think this is a restricted keyway??

The standard keyway has only a single V-shaped groove. There are three restricted keyways, all pretty rare, which have a second groove opposite the first. Ordinary American keys will not enter the restricted keyways without the proper groove. There is also a fourth restricted keyway, with a square groove, not much different from the Chicago double bitted keys.