It's a Frankfurt FM model from the early 60s and has the 'thru-hole' chrome faceplate for a 356. It also has the green dial lettering to match the 356 Speedo/Tacho/Clock. The ivory coloured buttons and knobs match the dashboard knobs are in very good condition...
http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... &rd=1&rd=1
Fitted in the dashboard of a 356, it will look something like this...
There's another one here too, but it's for a VW...
http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... &rd=1&rd=1

