My Vivitar Series 1 70-210/2.8-4 [made by Komine] has an "A" where you expect to see it, not a "P". The complete lineup of five manual focus Series 1 70-210's is described at:
http://www.robertstech.com/vivitar.htm The serial number of the lens will identify the manufacturer, just follow the instructions at the end of the web page cited above. Jim www.jcolwell.ca
