Old and New, thanks for the info. cb400bill, thanks for posting the pics (new Mac and I haven't quite mastered all the ins and outs yet)

I was planning to try a 27.2 seatpost when it arrived and then go from there on determining seat post diameter. The main reason I bought it was for it's rather rare (at least by today's standards) geometry. 60 cm seat tube and a 56 cm top tube. Works great with my build (long legs, medium torso).