original spark plug wrench

[39wdy]

Hi, I just checked my collection of Ford tools and I have four of those wrenches. I probably don't need four of them. They all have the circle with the M in it for the manufacturer's mark, no Ford script, the 1 and 1/8th inch open end for the plugs, and approximately 3/4ths inch for the boxed end. The wrenches are approximately 10 inches long cast pieces with the bend up for the spark plug end and the bend down for the 3/4 inch box end. The only difference in each of these is a number in raised numerals on the back side of the wrench near the boxed end. The numbers are 44, 47, 52, and the number 4 which is smaller in size and a little further away from the boxed end than the other three numbers. I assume these are just casting numbers (but if they have significance I'd really like to know about it). PM me I'm sure I no longer need 4 of these. Hope this additional info helps. Toby