Alplei. An Alpa lens mount adapter. This adapter converts Alpa mount lenses to Leica screw mount (LTM).
It is not coupled to the rangefinder. While it might be common in today's mirrorless era, one wonders how it was used in the past...
This is an original Alpa product. It allows you to attach Alpa's renowned lenses, such as the Macroswitar and the Kinoptic Apo-Chromat 100mm f2, to a Leica body. By using an L/M adapter in conjunction, it can also be mounted on Leica M bodies. Its aluminum construction makes it lightweight, which is a nice feature.
The adapter has a slim profile and a smart appearance. You can also stack two adapters when using it with digital mirrorless cameras.
While there are signs of use due to normal wear, there are no noticeable scratches, and it is in good condition. It has been tested mounted on Alpa lenses and a Leica body, and infinity focus is accurately achieved. It comes with the original box.
This is a somewhat rare adapter.