The Secret Society of Lathe Trolls

Hi, Would anyone have a schematic of a NTP 177-500 Phase Oscilloscope ?

Hello from Melbourne Australia.
I am the proud owner of a VMS66, with a VG66 and a SP272. All fully operational and used to belong to POLYDOR until I bought it.
I'm a newbie so looking forward to talking to a few of you in the future

regards