And we know it has 2&3/4" chambers- as that's how the Froggies mark their tubes in 70mm, whereas 65mm is a 2&5/8" chamber length- both approx--if you want to 'split hairs' here- blonde, redhead, whatever-our std. 2 & 3/4" Made in USA decimal based system is probably closer to the Froggies 69.6mm-- no big deal.
It is a seven pin back actioned sidelock and some idiot boogered the lock through pin head- too cheap to buy a second or third set of Graces from Brownell's and custom grind for an EXACT dead nuts fit- No excuse for that kinda crap--
