Those are Proto line wrenches and are excellent wrenches. The early versions were marked Plomb until the lawsuit/namechange. They came up to 1 1/2 I believe. skfarmer has a complete, or nearly complete, set.
Harry Epstein had or may even still have some NOS in some of the larger sizes.
I take it there isn't many out there.
They are actually pretty common. A bunch of people here collect them.
Worthless, common, not worth your time. (Hand wave.) You are not interested in collecting Proto flare nut wrenches. (Hand wave.) These are not the flare nut wrenches you are looking for.
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it went nuts and i just don't need any more doubles. a special thanks to j.a.f.e who helped immensely on my quest for these. enjoy the pics.So common that Bolster has a dozen of them just laying about...
Interesting stuff, anyways...
he did just buy those recently. If i remember correctly they were from an elderly woman who was near blind trying to raise money at a church sale to afford her eye drop meds. She was asking $10 for the lot but he talked her down to $5.![]()


i have a set of proto's up to 1 1/8 if you call that complete.i am halfheartedly looking for larger sizes. i saw a few that include an 1 1/4 last week on the bay.it went nuts and i just don't need any more doubles. a special thanks to j.a.f.e who helped immensely on my quest for these. enjoy the pics.

For a farmer, you sure do set up some purty poses for them tool photos![]()

...seriously thinking about starting to hunt these down to make a set.
have a wad of cash in your pocket? they have not gone down in value as of late. not discouraging you just giving you a heads up. took me about a year of hunting and much help from some good friends to put those together. they are pretty when you get them put together though.


I have four Proto line wrenches, found one at a time last summer. GJ member "Even 11" asked me for them first, so I will give him first right of refusal. But if he passes, these will be available next week.
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he did just buy those recently. If i remember correctly they were from an elderly woman who was near blind trying to raise money at a church sale to afford her eye drop meds. She was asking $10 for the lot but he talked her down to $5.![]()

Here's your shopping list:
3712...3/8
3714...7/16
3716...1/2
3718...9/16
3720...5/8
3722...11/16
3724...3/4
3726...13/16
3728...7/8
3730...15/16
3732...1 inch
3734...1-1/16
3736...1-1/8
3744...1-1/4

Good for you, Yellow! While you're hunting pick up a spare 1" would ya? Darn it if SK would just give me his home address, you and I could go pay him a night-time visit...hopefully he's not one of them gun-totin' types...

Yeller. Not to complicate your search unnecessarily, but these FN wrenches fall into two easily identifiable types: Either they say USA on the back or LOS ANGELES on the back. You should hunt the ones your grandpappy gave you, whichever they were.
And cut yourself a break: it is OK to substitute a Plomb if'n you caint find a Proto. Generally pricier yet but sometimes you gotta sub. Any Plomb you pick up can easily be resold once you have your greedy mits on your Protos.
don't be so sure about that bolster. look closely at the 15/16 in my collection. though it is an l.a. version it has the size stamped in the neck of the wrench rather than cast into the handle. it also is thicker near the head of the wrench. it kind of tapers narrower back toward the handle. if my theory is correct that is the earliest version and more like plomb wrenches. that makes at least 4 styles of wrench and if i look closely at my other wrenches ther are other subtle differances. the 4 major styles are plomb, tapered handle l.a., straight handle l.a. and usa.
I defer to the expert.
I agree, the stamp-on-neck is earlier than any cast-in-handle. So your 15/16 would be an early Proto version indeed.
I have two of those neck-stamp Protos that Jabberwoki was kind enough to obtain for me. (Thanks Jab.)
