Interesting drop plate for brake reach

 

 I recently saw this well machined drop plate on a mid 1980s Trek road bike. I have seen my share of drop bolts- from one by Campagnolo and Dia Compe to a few home made, dubious looking setups. This solution to needing to lower where the brake mounts  because of the caliper reach is too short is one of my favorites. It appears to be rigid and well supported. Anyone know anything about the manufacturer? 

a few sets of cool brakes from the second floor

a few cool sets of French brakes. Nice looking boxes as well

Mafac Criterium cantilever brakes.

Mafac Top 63 brakes

Bebolux braze on brake calipers

CLB Racer cantilever brakes

Some random brakes laying on the stairs

Rare Mafac Tiger, wide spacing between the pivots for clearance of larger tires and fenders.
Weinmann engraved centerpull brake, late 1950s.
First generation Mafac Competition brake, engraved.