[ARC5] O/T a bit...AVT-112 crystal information

[Craig]

Hey guys, I need a little guidance here. I picked up this week, an 
AVT-112 and an AVR-20-A for my L-5B project. I'd like to start watching 
for a crystal or set of crystals for the AVT. The only info that I can 
find on the crystals, is an RCA number MI-8412A-57D42-5KC. The 5KC is 
pretty obvious that it's the crystal frequency. This is the only number 
listed that I have been able to find, and it's in the IPB for the 
airplane. I'm sure there are alternate parts and I know alternate 
frequencies, as the airplane has a stowage rack for a dozen crystals. 
Any thing you can point to that would be of significant help and most 
appreciated.


Thanks,

Craig

KF5JOT

Fairchild AT-21-BL

42-48053