Eric,
I don't recollect Serotta ever doing a bike in Tange (let alone #2) tubing, but since those folks are just up the road a piece, I will try and find out what I can........of course there was a time when Ben did not own the company, so who knows what was going on, but Tange & Japanese built bikes were certainly possible.
As we have discussed so often before, the value of something is....well you know where this leads!!
My sincere regrets for not getting to the Cirque (again!!) this year.......have fun y'all!!
Chuck Brooks
Malta, NY