Sal,
Step back and look at your carbine. Do you have any full pictures of the JLB carbine? It seems that yours is put together with scraps than assembled off the line.
1st is the T3 barrel band (came after the contract cancellation,mostly at rebuild)
2nd is the milled trigger housing(used up til about July/Aug `43)
3rd is the T3 hammer(looks to be a W stamp)
4th is the flip safety
5th although the finish seems uniform,it seems to be missing something,looks too much "parked"
6th if you want to impress someone with a presentation anything,you want it to be shiny and flashy,not dull and flat
7th Did the collector offer too buy based on the GHD stamp?

My vote goes to:no collectible value,worth the sum of parts