Some before and almost after photos. It is a 606 that I am redoing for my old man's 70th birthday present.
After a lot of digging by various folks on here it appears that only the ones that have GUAR EXP on the slide as well as the date were released for sale 5 years prior to the date. Very early 1941-1944 vises were for the war effort and had no stamp plus they only had a one year warranty in the beginning. There's a long post about in the Vintage Tools section.
Blubolt--- I didnt think wilton started using the guar exp stamp until the 1950s. Thats why I was curious about the 1945 stamp. Ive never seen anything stamped earlier than 1945 before. I still don't quite understand the Wilton dating system.
Yeah the Wilton dating system will drive you nuts. Almost as bad as dating women LOL. Wilton used the GUAR EXP stamp for about 5 years from 1954 to 1959 and then went back to just dating them with the date they were released for sale. So off the top of my head.
1941-1944 no dates stamped, war effort
1945-1953 stamped with date of when released for sale. Warranty expired 5 years AFTER date.
1954-1959 stamped with GUAR EXP and the date was when the warranty expired.
1960 to present stamped with date of when released for sale. Warranty expired 5 years AFTER date.

PCAR: Rock Island date stamped (the ones they did cause not all stamped) on the dynamic slide just behind the static so i'm guessing you are correct without seeing a picture of the date stamp.
how do you like ROCK ISLAND quality cause i think they are up there fighting for the #1 spot in my book?
Nice bunch of little critters, Zoom.![]()
I picked up a new "display table" for my little fellas...
Take care!
ZOOM
PS: DAMN TINK!![]()

. That is very nice find and it is in very good shape. It is for sure pretty hefty and should serve you well.