I discovered a batch of these derailleurs in the collection of a fellow cycling hoarder. For 28.6mm clamp-on applications and two-ring double cranksets.
Shimano DuraAce FD-R9100 Band On 31.8mm Front Derailleur - New
NOS Shimano chain guard cover 42 teeth 94 shimano cranks & others SW-714
NOS SHIMANO 105 11 SPEED FRONT DERAILLEUR FD-5801, 34.9mm CLAMP
NOS, SHIMANO DURA-ACE 7850 CARBON 700C ROAD BIKE RIM, TUBULAR, 16H
NOS Shimano Deore XT Top Pull 28.6mm Front Mech 8 Speed
NOS SHIMANO 105 11 SPEED FRONT DERAILLEUR FD-5801, 28.6mm, 31.8mm CLAMP
