I Found this in a garage in norway. I think is from around 1910-1915.
1927 Wyeth Hardware & Mfg. Catalog Walden Worcester ad pp 1916 by four.cycle, on Flickr
1928 Marshall-Wells Catalog Walden-Worcester ad pp 3944 by four.cycle, on FlickrI Found this in a garage in norway.

How very improbable and cool! [emoji106]
I agree! It would be interesting to know how that got all the way to Norway. Welcome to the site Stipau! Are you planning to look for the missing wrenches? They turn up here more often than you would think. I was at a yard sale a while back and they had a box full of those old specialty wrenches.
whoa...
I have several hundred of those old catalog pages here... probably over a thousand.
I have forwarded hundreds of them over to Todd at ToolArchives.com
He has them posted on that site available for download in *.pdf format.
I have some of them posted here in one of the "Walden" threads and on my flickr.com page (same handle as here: " four.cycle " )
I still have several hundred more I need to get forwarded to Todd yet, but check there and take a look and see if you can pinpoint that particular part number.
In the meantime I will look through what I have here and see if I can spot those, but it's kind of like looking for the proverbial needle in the haystack.
F124C said:Can anyone tell me what tool A3620 or M3620W on the Walden-Worcester Ford Tool Boards fits?

F124C:
Your first statement needs clarification.
The model 3620 wrench shown on the boards in post #2 and post #7 does not match your description just above.
The model 3620 Walden Worcester wrench shown on those two tool boards more resembles the model 267 Indestro wrench shown HERE:
http://www.garagejournal.com/forum/showthread.php?p=5965088#post5965088 (right-hand page, first column, second from bottom)
Note the Walden Worcester catalog illustrations of the model 3620 look like it's got a 6-point opening, and the description of the model 267 Indestro clearly states it's an 8-point on both ends, so unless the (Walden) illustration is drawn incorrectly (which is always a possibility) we do not have a match there.
Unfortunately the catalog illustrations and the item descriptions of the Walden Worcester display boards are not telling us the details on the tools themselves, so I have no idea if the model 3620 Walden Worcester has the same size ends as the Indestro, but its general appearance looks to be somewhat similar. (Of course, that's about the same as saying all goats look alike.)
If your question is what the application for that particular tool is, the only person who's going to have an answer is somebody who actually has worked on one of those older Ford vehicles and knows something about the plethora of "specialty" tools that were required to repair them, of which there was no small number.
That should make it about as clear as mud, right?
(Did you check ToolArchives.com and see if he's got an early Walden Worcester catalog available for download?)
uploading photos is pretty easy. not sure where the "how to" page on that one is, though.
other sources: tool-archives.org / toolarchives.com / thegaragegazette.com / papawswrench.com