A4 16-inch OEM wheel offset

[Martin Cote]

I recently purchased a set of re-conditioned 'classic' A4 OEM 5-spoke
16-inch alloy wheels; one of the 4 wheels seems to have a different
offset (around an extra 3/8 of an inch). Does this make any sense? since
the A4 5-spoke wheel model was sold for several years, is it possible
that Audi introduced small changes from yesr to year? Where can I find
the part number on the wheel (the tires are already mounted)? Anyone
knows who is the OEM supplier of these wheels?

MartinC A4'98.5V6Quattro-Sport-Standard
Montreal, Canada