B17g plate from crash site

[THUNDERBIRDS1965]

Hi,can you help me to identify this metal plate from a crashed aircraft?
Thank you.
Laurent.

[Robbo]

Just had a very quick look on the net. Seems that that Brigg made parts for the B17 and this could be the plate from the right side flap. The left side serial number ended in 617 and this is 618.