Re: What does the "19" mean on this swordbelt plate?
The number is the inspector's bench number or bench mark. These pieces were inspected and approved before distribution to the troops.
The cool thing about your piece, is that it shows a Field Repair. It looks like the original tongue broke off, and someone punched or drilled the plate and inserted an iron loop to hold the plate in place.
Very cool! That's the first one I've seen field repaired like that.
Best Wishes,
Buckleboy