Hope I don't wear out my welcome. Here is a speed Wrench. It's 22 inch long with a 4 inch throw. The shank is 3/8 inch diameter. The socket is 9/16. The drive end is square about 10/32 near as I can tell because the socket won't come off. That's because the drive end is mashed out inside the socket. Whether by design or by a frustrated mechanic I can't tell but suspect the latter.

The diamond stamp mark is the same as the Model T Ford wrench I posted before so this must be a Mossberg tool.  The ID number is No 611. Is this another Ford wrench?
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After writing the above I Googled >Mossberg wrench number 611<. Got a few hits and one on this forum (Sept 23,2012) for a long wrench - longer than this one.  No Z that I can find. Do those wood handles date this wrench?

I found one on Ebay looks like exactly the same but no info. About $8.00. http://www.ebay.com/itm/Vintage-Frank-Mossberg-Speed-Wrench-9-16-Nut-Size-/151105906221

I'll assume my wrench was the old man's and he used in on his Fords.

Didn't do the pics upload correctly. Here's the wrench.

that's quite interesting

wood is unusual

I cant find much reference to that number


what size is the socket at the end?

I have a dozen or two of those crank handle socket tools, but none with that nice of a handle.   This is made like a good brace drill, plus the wood on the crank.   Mine with wood are much plainer, and have no wood on the crank.  Do not have any Mossbergs. 

Oops. The Socket is 9/16. 

It's well worn. This wrench must have been a workhorse.

A lot of mechanics used metal-frame braces in the early 20th century - they were not thought of strictly as carpenter's tools then.  So it's a short step from that to this nice speed wrench. Much more comfy than an all-metal one.

Yep, that's neat looking. I don't think it looks that well-worn, myself.

Well the shank is bent in 2 places -  I layed a straight edge along it. Somebody musta leaned on it real hard. Here's the sockit and you can see how it's wallerd out.

I suspect somebody used it for a breaker/final tightener instead of just speed.  Can you believe anybody would do such a thing? :-)