You are right - Mongo had forgotten the Pentax 135mm f1.8 – also quite renowned. Should also let you know that Mrs Mongo has the original Pentax A*300mm f4 lens – a gem. Mongo also had the Vivitar Seris 1 105mm f2.5 (purchased new years ago) . A super lens. Sold it last year still as new in its box to an AP member who has made great use of it. Mongo must say, though , that the best of these (approximate 105 mm macros range) in his opinion, is still the original manual Tokina 90mm f2.5 – now rare.
It was extremely interesting to read the material on some Pentax classics in the link you provided
No arguments from Mongo on blanket statements – they can be cause for swift scrutiny and Mongo has since qualified his statement to something he believes to be closer to what was intended.