Shimano BR A550  Side Pull Calipers  ( Front / Rear )

Silver - 57 depth   /    Allen Key bolt Fitting.

47 - 57 mm       /    Silver Finish..

Circa 1990   -   RX100  Series -  6 / 7 Speed Item..                                                                     Ref.32

PLEASE NOTE - Calipers are Medium depth ( 47 - 57 ) 

PLEASE NOTE - Supplied in Plain Pkg. ( NOT Branded box )...