Question by stigma

Good day! Who knows what's what in the stigma placed on 60's series?
I met the three types of stamps

1) The font is not bold. After lettering BENCHMADE point no. In abbreviation U.S.A. three points:

D2
BENCHMADE
U.S.A.
http://www.lamnia.fi/items.php?lang=ru&pid=4372

2) Font bold. Everything else - like a hallmark of the first kind:

D2
BENCHMADE
U.S.A.
http://www.lamnia.fi/items.php?lang=ru&pid=6189

3) Font bold. The point after the inscription BENCHMADE. In abbreviation U.S.A two points

D2
BENCHMADE.
U.S.A
http://www.lamnia.fi/items.php?lang=ru&pid=5772

There is no reason to believe that what that fake knives. Question - when a stamp set?

These are my 62 and 63 bali. As seen stamps are differ. 62 stamp type 1, 63 stamp type 3.

I have no reason to believe that some of them fake.