Briandumais
1199
Here are the results for the crown diameter
Early milspec 5.26 mm
tr-900 5.99 mm
Civilian milspec (demo) 6.30 mm
No rad Aqua lung 5.99 mm
Michanny (early milspec) 5.29 mm
Good stuff!
By: fmsmb : April 29th, 2013-07:11
Brian - Thanks for the additional information. It also appears that the tube size is 2.5 mm and the domed crown needs to be quite high to accommodate a fairly long tube. Thanks again. Frank