For Trade Mamiya C Professional

Single exposure attachment with 3 plate holders for Mamiya C Professional (C330, 220, C33, etc
Never used, new in box . Will trade for 35mm rangefinder, what have you got ? Will also sell for $75
Thanks, johnpohl19

Wow, never knew such an item existed!!! But alas, according to here, the "conventional" attachment won't work on C330… which is what I have

http://www.galerie-photo.com/manuels/C330_english-accessories.pdf

Pictures please. These are plate holders, not single sheet film holders?