Howard... May I suggest the Draganfly online parts catalogue to supplement your own parts book. This will enable you to compare the part numbers of what you have and what you should have.
Yokes are a minefield, sometimes having forging numbers, sometimes not. In addition, some basically identical forgings will be machined differently, threaded holes added etc, and thus have different part numbers, although still carrying the same forging number, which can be different from the part number by a fair amount.
As a general rule for the major castings, the part number differs from the casting number by one or two digits, but there are exceptions, as here. Slim chance you can identify your existing parts as being correct or spurious without comparison to a known correct item, so hopefully other Forum Members will be able to help.
Swarfy