Cabboy - yours is a somewhat later box.
I do not have all of the various Carter tool sheets, however:
(1) the box I posted is the earliest of which I have documentation (1935)
(2) the same box was also used in 1936 documentation
(3) I do not have the sheet from 1937, but your box appears in the 1938 sheet
(4) the same box also used with the 1942 documentation
(5) by 1951, two additional boxes appeared, and yours was no longer used
(6) in 1952, an additional two boxes appeared, and the ones used in 1951 discontinued
(7) the boxes introduced in 1952 were carried through at least 1957, which is the last year of which I have documentation
(8) there is at least one box later than 1957, which used a stamped steel tool enclosure, rather than the wood enclosures used earlier.
By 1938, Carter offered three different types of tool sets. The most expensive (and most complete) was called the Master Set. Another general set, but less complete than the Master Set, was the Junior Set. Both the Master and Junior Sets used the large box like yours. Carter also offered several different Dealer Sets. The Dealer Sets were in the smaller box (same size as mine, but different wooden tool enclosure), and the different ones were offered with tools specific to a specific marque, such as Chevrolet.
Maddening, at least to me, is that Carter did NOT place all of their special tools in any set, some had to be ordered at additional cost. The tool that I thought I would never find was the tool which made easy the removal of the "top hat" ball retainer in the bottom of the pump well on Carter type WCFB carburetors. I think I paid like $250. for the first one maybe 40 years ago, and it paid for itself in reduced labor costs (and aspirin!) the first month when I was still restoring carbs!
I have a fair collection of carburetor tools of all makes.
Jon.