The first two are the 974 that I got a few months back. I only just got the wrench that goes with it yesterday, though.
Here's the Simplex 41S (49lbs, made in Woonsocket) that I gave to my father. The ruler in the pictures is 12" long.
From L to R, C. Parker 994, C. Parker 975 (missing the anti-finger pinching device), C. Parker 974, Columbian with bent handle, Wilton. The 994 is going to a friend.
My 4
The Wilton got beat on

(it's also missing its back cap)
Little guys (that's a 24" ruler)
Same ruler next to the C. Parker 994. It weighs 89lbs.
5 minutes with my torch and hammer on the purple Columbian.
Somehow I managed to forget to take a picture of the 975 next to the 24" ruler... But it's pretty much the same length. According to the catalog, it weighs 104lbs.
I'm going to buy the rest of them with the intent to keep a couple for myself and sell most of the others. I might go get them Saturday... We'll see.
I realized I didn't have one of the 975 next to the ruler.
I have access to 13 other old vises in various size. I plan on buying and reselling them. Right now they're just sitting, not getting used.