Bob & Christian Sincerely many thanks for your thoughts and opinions and research. I went ahead, bid and won a AP Takumar 135 f2.5 52mm lens on ebay. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2982440022
I won it for $38 and probably wouldn't have bid much beyond this. I have not taken any film through it yet, but I will this weekend. Bob At least looking at the photos of the links you sent, they all Seem the same as mine ie 52mm front filter, and fancy coloured lettering. Thanks again Ian