"Real" Bore of a "Real" 36K

[iiipopes]

OK. We all know that the current 36K is actually the King with a .687 bore.

We also know that conventional wisdom is that the real 36K is simply the fiberglass version of the 14K with the .734 bore.

Now, what's this on the Conn Loyalist that claims that the bore of a real 36K is a "#10" bore, or .719, instead of the .734?

Line from the chart on the Conn Loyalist Website:
"36K #10 Bore BBb Fiberglass Sousaphone with 24" bell. 1960 - (current 2002)"
http://cderksen.home.xs4all.nl/ConnSousaModels.html" target="_blank
http://cderksen.home.xs4all.nl/ConnBoreSizes.html" target="_blank

Please discuss.