The HTF bridge was a Japanese-made replica of Gibson's famous ABR-1 bridge, that was fitted to the Gibson Les Paul solid body. It first appeared on the Matsumoku Les Paul copies circa 1969/1970, but was used on a number of other solid body guitars produced at the Matsumoku factory, Matsumoto Japan, from 1969 through to the mid 1970s. This facility produced guitars for export around the world, and this bridge appeared on guitars branded: Aria (5522), Jedson (4444), Shaftesbury (3400) - and most likely many more.
It is not 100% clear who manufactured this part. Although widely used in Matsumoku instruments, it may have been supplied by a third party manufacturer. Do you have a guitar with an HTF bridge? If so, please comment.
Dimensions: Similar to the Gibson ABR-1 that it copies. 83.4mm long x 11.1mm wide. Unlike the ABR-1, posts are adjustable with a 5mm hex key. String holes are 6mm wide on the ball side, and 3mm wide where the string emerges.
Post hole centre to centre 73.4mm. Posts have a total length 32.0mm, with the threaded part 20.0mm. Thread is metric M8. The unthreaded part of the post has a diameter of 7.3mm, requiring a comparatively large 8.5mm diameter hole in the bridge itself.
List of Matsumoku bridges / tailpieces / tremolos
The HTF bridge in situ on a 1971 Shaftesbury 3400 Les Paul Custom copy. Shaftesbury was the house brand for UK distributor Rose-Morris who imported these guitars from Matsumoku in Japan.
Gold plating is never particularly durable on a guitar, and it is suffering from significant wear in this example.
Underside view of the unmounted bridge, with posts.
Disassembled bridge base with saddles and wire clip. The design of this bridge comes from the ABR-1 used by Gibson on their Les Paul guitars throughout the 1960s.
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