Summary

This article is a list of Mamiya Leaf backs and their serialnumberprefixes that show what cameramount the back has.

In-Depth

Credo - the second letter will denote which type of mount is on a particular back.

Credo 80:
LN xxxxxx - Mamiya
LJ xxxxxx - Universal
LK xxxxxx - H1/2
LM xxxxxx - Contax
LQ xxxxxx - AFi

Credo 60:
LH xxxxxx - Mamiya
LE xxxxxx - Universal
LF xxxxxx - H1/2
LG xxxxxx - Contax
LP xxxxxx - AFi

Credo 50:
LU xxxxxx - Mamiya
LR xxxxxx - Universal
LS xxxxxx - H1/2
LT xxxxxx - Contax

Credo 40:
LD xxxxxx - Mamiya
LA xxxxxx - Universal
LC xxxxxx - H1/2
LB xxxxxx - Contax
LO xxxxxx - AFi

Aptus II - the first number following LI (Leaf Imaging) will denote which type of mount is on a particular back.
LI2xxxxx - Universal
LI3xxxxx - Mamiya
LI4xxxxx - H1/2
LI5xxxxx - Contax
LI6xxxxx - Afi

Note: Units produced by Kodak starts with prefix LF or NR, however, the serial number does not indicate what camera platform it fits.