The A-17017 Spark Plug and Cylinder Head Wrench...

[Steve Plucker]

OK...I have been inventoring all of my Model A tool items as described in Section 17, Revised 2016 of the MARC/MAFCA Restoration Guidelines and Judging Standards.

I have a few A-17017 Spark Plug and Cylinder Head Wrenches of the 9/16" hex head type (October 1928 thru production).

On the back side of these wrenches have an "M" in the center of a circle for the Moore Drop Forging Company.

Toward the 9/16" hex head end of the wrench are numbers which indicate a forging batch I guess.

These numbers range from 3-45.

My question then...were there any wrenches, that you may have in your collection, that have a number greater than 45 on these wrenches with the 9/16" hex head thickness?

NO...I do not plan to do any research on this...I just find it interesting!

My guess is that when the company went from a 3/4" to a 9/16" hex head thickness...they started the "batch" numbering all over again because I have the early one with the 3/4" hex head thickness with a 10 on it.

Pluck

[Doug Linden]

Steve, just looked in my tool box and my wrench has the # 50 in addition to the Moore logo.

[Steve Plucker]

Thanks Doug!

I wonder if this number can go any higher?

It would be kind of neat to know just how many "batches" were actually done and how many wrenches per batch...But I ain't going there.

Pluck

[Terry Burtz, Calif]

The number is not related to "batch"

It is simply the forging die number.

During quality control inspection of finished wrenches, if there was a problem, it could be traced to a particular die.

[ed thibodeau]

Mine has the number 73 in the circle

[Steve Plucker]

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Thanks Ed...Pluck

[Kurt in NJ]

In my home collection one with no #, and one with a 7

[marko39]

Originally Posted by Kurt in NJ

In my home collection one with no #, and one with a 7

Mine also has a 7 and is 3/4 hex.