The adaptamatics were the precursors of the
Tamron Adaptall swappable mount system. The two systems are completely different. Adaptamatic mounts can be found for: C-AF for Canon FP, FT, FX and Pellix (FL fit, usable on many FD cameras with restrictions); EX for Exakta bayonet; M42 screw thread; N-IF for Nikon F, F2, Nikkormats etc (pre-AI); M-A for Miranda F, G, Automex Ill and Sensorex ; SR (no meter coupling) and SRT (meter coupling) for Minolta ; K-A for Konica Autoreflex; P-E for Petri; T-O for Topcon.
Note: PK came later so no PK (use M42 + adapter).
The mount locking ring is a M58 thread -
this DIY article discusses diy mount possibilites.
Scan of original adaptamatic user manual posted
here.
The 135mm is most commonly found as Adapt-A-matic Interchangeable Mount, but was also made as a fixed mount, and as the first version
adaptall 135mm. And in fact that lens' successor the
CT135 is very similar in specification.
There is also an uncommon and relatively undocumented f3.5 version, later style with rubber focus grip rather than original milled grip (pic 2 - courtesy Luis Alegria).
135mm F/2.8
Optics: 4 elements in 4 groups
58mm filter
1.5m close focusing
9 Blade aperture
Length: 3.5" (89mm)
Weight: 14.6 oz. (415g)
Solid metal build
Built-in Hood
Auto-Manual Switch
Can also be found as a Bushnell.