I bought this as a part of a studio bundle decades ago and it said in my rack mostly unused. So this has seen very little use or abuse. I trust that it is working great and I'd love to see it in the hands of somebody who can make better use of it. (Actually, if you give me a great story of how you will use this, maybe I'll reduce the price for you!) UPDATE: I have the manual for this as well! Yay!
This description is from Sound on Sound:
The MIDI Timepiece AV is a professional 8‑input, 8‑output MIDI interface, MIDI patchbay, SMPTE‑to‑MIDI converter and digital audio/video synchroniser for Macintosh or PC. You can connect it to a Macintosh serial port — modem or printer — or to a PC, either via a serial or a parallel port.
The MTP AV can be programmed from either its front‑panel LCD or from the Console software provided, and you can store your setups in the MTP AV's internal memory locations. Using the Console software, you can call up and modify any of the preset 'Base Setups' supplied as starting points. Setups can also be stored to disk on your computer, so the Console application is basically an editor/librarian for the MTP AV. Once you've edited and stored your setups, you can use the MTP AV as a stand‑alone, customised MIDI processor, with no need for an external computer. On the other hand, if you intend to use the unit with a MIDI sequencer, such as Performer or most other popular software, you don't actually need to use the Console software, as you can control the unit directly from within the sequencer.