1st Day-Siegel's Gross Sale Sales Of Note - Hammer Only; Buyer Fee, Tax And Shipping Not Included

I've never understood the fascination with the different listings of the 9X1 with different styles of signatures, whether "ACM" or "AC M" or "A.C.M.", etc., I mean who doesn't have different styles of signatures if they are in a hurry or signing hundreds of objects at a time. Does "ACM" connected or "AC" connected indicate a different printing or any other meaningful distinction other than his hand moved in a different way when signing a small portion of the stamps? I guess the A.C.M. may have been attributed to someone else [his father?], but other than that, why do different styles of one man's initials deserve different catalog numbers?

And the missing signature, in particular the se-tenant, would that be considered an "error", kindof like a missing color error, where the signature on one stamp or row of stamps was accidentally missed, rather than an entire sheet being released unsigned?

Getting signatures from the three different signers of these stamps, and, in addition, a no-signature version, seems significant to me.

I agree that the varieties within signature would seem to be minor varieties (off-hand), but the different signatures themselves, vs no-signature, I would certainly consider to be major varieties, worth collecting.

This se-tenant item to me, seems pretty significant. It is difficult to compare it to a 'printing-error', although I understand your motivation for doing so.