I grew up calling these "Engineer's Wrenches".
I've come to realize that some here reserve that name for DOE's.
If you have time to chime in with pictures of yours, let me know what YOU call them!
I grab 'em when I can, unless they're a duplicate of what I've already got. Here's mine:
Fairmount
3/4 1 1/8 1 5/16 1 1/2 1 1/2 1 7/16 1 5/8 2 2 3/8
Blue tape covers, as Tubalcain says, dead men's names.
Of the 5 brands I've encountered, the Fairmount wrenches are by far the roughest, most utilitarian.

Billings
1/2 2 1/4
Bonney
1 5/8
Williams
1/4 (x3) 7/8 1 1 1/4
I don't clean mine up, but the 1 1/4 arrived in sandblasted condition as a well-intentioned gift. It's from a hard-rock mine exploration trip.
The 1/4's are my smallest and i couldn't help but break my no duplicates rule. They are scavanged from sprinkler system check-valves.
Armstrong
1/2 1 1 1/16 1 1/4 1 13/16 1 7/8 2 3/16 2 1/4 3 1/2
By far the best fit-and-finish. The hammered ones are pretty special.
Bonus picture of the logo from the 3 1/2....they took some pride in what they did.

I've come to realize that some here reserve that name for DOE's.
If you have time to chime in with pictures of yours, let me know what YOU call them!
I grab 'em when I can, unless they're a duplicate of what I've already got. Here's mine:
Fairmount
3/4 1 1/8 1 5/16 1 1/2 1 1/2 1 7/16 1 5/8 2 2 3/8
Blue tape covers, as Tubalcain says, dead men's names.
Of the 5 brands I've encountered, the Fairmount wrenches are by far the roughest, most utilitarian.

Billings
1/2 2 1/4

Bonney
1 5/8

Williams
1/4 (x3) 7/8 1 1 1/4
I don't clean mine up, but the 1 1/4 arrived in sandblasted condition as a well-intentioned gift. It's from a hard-rock mine exploration trip.
The 1/4's are my smallest and i couldn't help but break my no duplicates rule. They are scavanged from sprinkler system check-valves.

Armstrong
1/2 1 1 1/16 1 1/4 1 13/16 1 7/8 2 3/16 2 1/4 3 1/2
By far the best fit-and-finish. The hammered ones are pretty special.
Bonus picture of the logo from the 3 1/2....they took some pride in what they did.

















