ATM/Holley verses Carter 625 AFB

Newbomb Turk said
I agree. I’m pretty sure (abut not 100%) it’s not a FM piece.

Check the calibration and the IFR's should be in the area of 28-31 and the emulsion package should be rows of very small holes evenly spaced all the way down the tube.

Also FM went to a die cast design where the Carter was cast