I think that this is the KuhlerKlappe (cowl flap) from a Ju88 A-1 with Jumo 211 engine.

https://www.ebay.co.uk/itm/Flugzeug-Detail-Ju88-LW/182979973559?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649

The crease on the RHS is for the overlap with the adjacent flap. single metal point is for the push rod. the rear two for hinge (?)

http://www.warbirdphotographs.com/LCBW13/Ju88A-1_7f-s.jpg

The Ju88 manuals have the adjacent undercarriage blister as part number 541 ( left) and 551 (right).

This one has number 88. 651.83.

I have one similar coming from Russia which is why I was looking.