Hole-change numbering system question

[L4R3L2]

My old Sargent & Greenleaf lock only had two wheels present (out of three). This is my first experience with hole change wheels.

Upon disassembly, I noticed the wheels and flys were numbered. I would have thought that wheel "1" would have fly "1", and so on.
One wheel was #1, and the other wheel was #4. I thought, hhhmmm, I guess these wheels must have been from a four wheel pack at some time. I also notices the flys were #2, and #5, respectively. So, they got mixed up. But, wait! "5"! WTH! So much for that theory. Furthermore, I noticed that a broken fly that was being used as a spacer was #8! O.K. Now, I KNOW there are no 8 wheel locks out there!

So, the gears started turning, and the only logical answer I could come up with was that they are numbered according to assembly order.
(--) indicates a numbered part that was not in my lock....

#1 combination wheel (what we call wheel #1)
#2 fly for wheel #1
#3 isolation washer (no stamped number was on mine, nor would I expect one to be, given how thin they are- so, assembly order as assumed #3?)
#4 combination wheel (what we call wheel #2)
#5 fly for wheel #4
(#6 isolation washer (assembly order number assumed))
(#7 combination wheel (what we call wheel #3))
#8 fly for wheel #7 (broken fly #8 in mine being used as a spacer)

Does this make sense? Is this how the numbers work on these S&G?

[MartinHewitt]

It does make sense. I have an old key lock where the levers are numbered in the order of assembly.

[Oldfast]

Yes, I too can confirm your thoughts on the #'s and assembly.

I just took one apart that I have here and they are also numbered
just as you described. In fact, even the thin isolation washers have
been stamped with a number. All goes together accordingly. Yep.

[L4R3L2]

Thank you, Gentlemen. I'm surprised the washers were stamped. Maybe mine is just worn. I looked hard, but couldn't see any evidence of a number.

[Riyame]

Yes, I too can confirm your thoughts on the #'s and assembly.

I just took one apart that I have here and they are also numbered
just as you described. In fact, even the thin isolation washers have
been stamped with a number. All goes together accordingly. Yep.

Ah, early idiot proofing at its best Well, as long as you can count to 10