Mike, to give an idea check the minimum and maximum frequency coverage in Mhz, check what the maximum pass band switch position is in Khz,
Check if there is an Xtal control facility on the first osc, this may help to narrow down which variant it is.
[EDIT: looking at your pictures there doesn't appear to be an antenna trimmer fitted as a front panel user control, there doesn't appear to be a topside sub chassis for a 1st mixer xtal control, on that basis it would appear to be CR150 or CR150/2 the CR150 tunes up to 60 Mhz, the CR150/2 tunes up to 22 Mhz]
Lawrence.
Check if there is an Xtal control facility on the first osc, this may help to narrow down which variant it is.
[EDIT: looking at your pictures there doesn't appear to be an antenna trimmer fitted as a front panel user control, there doesn't appear to be a topside sub chassis for a 1st mixer xtal control, on that basis it would appear to be CR150 or CR150/2 the CR150 tunes up to 60 Mhz, the CR150/2 tunes up to 22 Mhz]
Lawrence.
