American Lock Question

[chaos4zap]

When I went to the local hardware store to pick up a new lock, they had an american padlock hanging there without a package and I decided to pick it up. It say's series 50 on the back and "SFF", could someone fill me in on what model I actually have and what the letters mean? Also, I haven't had much luck so far. I know you have to use very light tension on these because of the serrated pins, but I can quite get it. I can feel pins moving from one serration to another, but with such light tension...I don't think I can pick up the difference in movement when a pin actually "set's" I know, I know......these lock are probably something you get a feel for after practice...but if anyone has any technique advice specific to American locks....ANY guidance would be appreciated to point me in the right direction.

Also, I know there are many threads on American locks already, but without know exactly what model this is...it's hard to do a specific search. I know exactly what's in these can vary a good bit from one model to another. Serrated pins seem pretty standard though. I also tried to take it apart, but the screw inside the shackle hole looks like someone tried to drill it out and I can't remove it. No wonder it was without a package and "priced to move"

[Squelchtone]

The letters are a manufacturer date code.

The model is a Series 50/ Model 50, the only difference in exact model number will designate shackle length and sometimes the body material such as brass, steel, or aluminum.

Here's a thread with the date code chart: viewtopic.php?f=9&t=44614&start=11

Yours looks like made in August 1999, could it be that old?? Maybe they've changed the date code since I last posted it.

Enjoy,
Squelchtone

[chaos4zap]

Thanks Squelch,

It is very possible it is that old. It was in good shape, but didn't look new.

[anarchy_punk]

I found 4 serrated pins and 1 serrated spool in my American lock