in 1973 I went to Japan and bought an
Asahi Pentax Electro-Spotmatic with help from a Japanese Camera Magazine writer-- it was much cheaper than British prices BUT I had to pay Import Duty and VAT at Heathrow Airport London -- anyway , it worked well for a while then I noticed if I took a series of quick shots in varying light. some were heavily over-exposed with a slow shutter speed-- I found out the metering circuit had a 'memory' effect as it relied on CdS cells not the later Silicon Blue type in later MX and ME Super models -- I had to use it set to 'manual exposure' most of the time -- I found out it was a 'Japanese Home -Market Model' and in the export versions there was a different battery too -- I sold it for £85-00 to a Camera Club member who kept asking for it as it had original box and instruction book and brown case.
I went to Kenya, Africa with the Pentax Club of Great Britain when Pete and Liz Cox organised trips and took these on PERUTZ C18 film and with the 135mm f2.5 SMC Takumar I bought from the 'Brentwood Gazette' newspaper for £10-00 as they had broken their Pentax ES !