interesting. I read the advert and according to them, a customer of theirs said "It's a real Protax!". I was curious about this and I did a search for 'Protax cameras' and 'protax' (in a 'protax' was not a camera brand but was a make/model of something that was considered good at the time). It appears that 'Protax' is a brand of digital cameras. It also seems that 'Protax' also make some of those toy cameras that are meant to look like SLR's but that have a simple non-reflex viewfinder, a range of apertures that start at f6.3 and have a curved film plane.
I'm wondering what a 'protax' was and where, when, how and why 'Protax' was at some point considered to be a good thing>
Looking at it, this camera appears to be a type 2 Kiev 4a, c1974 - 1980 according to Princelle; the advert itself mentions the year 1982 and Kiev 4A. Again according to Princelle, 1963 was the only year for the 'no-name' Kiev. Looks like a clever bit of marketing/branding by Cambridge Camera - suspect the 'Pro' refers to the list of pro's in the advert. Seems they have wiped the 'Kiev' name off the face - I think that line is the very bottom of the KNEB/Kiev logo :)