"Assembly number to keep parts together while being manufactured."
No, it's a fitters mark. It identified the workman who did the soft fitting of the yoke, cylinder and sideplate to the frame. The Assembly number will be found near the yoke hinge on the yoke itself and the frame, the bottom of the grip frame and inside the sideplate. This consists of strictly numbers, usually 4-5 characters long. It is not alpha-numeric.
"Assembly number to keep parts together while being manufactured."
No, it's a fitters mark. It identified the workman who did the soft fitting of the yoke, cylinder and sideplate to the frame. The Assembly number will be found near the yoke hinge on the yoke itself and the frame, the bottom of the grip frame and inside the sideplate. This consists of strictly numbers, usually 4-5 characters long. It is not alpha-numeric.