I have been collecting a set of Mamiya primes lenses for a while and now proudly have a set of six 645 prime lenses with mounts and focal multiplier.

Mamiya Sekor C N 35 mm
Mamiya Sekor C N 45 mm
Mamiya Sekor C N 55 mm
Mamiya Sekor C N 80 mm (the famous Dark Knight lens)
Mamiya Sekor C N 110 mm
Mamiya Sekor C N 150 mm

RED 645 Mount
Arri 645 Mount
LPL / M645 Kippon Speedbooster (0.7x) 

The Kippon Speedbooster means this kit is effectively 12 lenses since each lens can be used with native 645 mount as well as in conjunction with the LPL Speedbooster which not only adds the optically preferable LPL mount options but also creates a wider and faster lens set, for example the Dark Knight goes from 80mm f/1.9 to 56mm f/1.3

Mamiya Sekor C N 35 mm > Kippon Speedbooster to LPL at 24 mm 
Mamiya Sekor C N 45 mm > Kippon Speedbooster to LPL at 32 mm
Mamiya Sekor C N 55 mm > Kippon Speedbooster to LPL at 39 mm
Mamiya Sekor C N 80 mm > Kippon Speedbooster to LPL at 56 mm
Mamiya Sekor C N 110 mm > Kippon Speedbooster to LPL at 78 mm
Mamiya Sekor C N 150 mm > Kippon Speedbooster to LPL at 106 mm

All lenses with focus gears and 80mm OD front rings.