Once again, Thanks for all the suggestions here. I will try to clear a couple of things up . . .

It is definitely two plastic layers, each about 2-3mm thick, they look to have been bonded with a resin of some sort

The ‘possible wire and plate’ seen at the 2 o’clock position is in fact a modern paper ID label with string – there were no wires that i remember

It was found in the middle of a field when crops were being harvested by hand – there are a few crash sites near by but it doesn’t belong to any of the aircraft that are known to have crashed locally. There was lots of aerial combat over this area in early to mid WW2 – i have many eyewitnesses that confirm this

Nearest German crashes are (South) He111 and Ju88 at Bishops Stortford. (North) Ju88 at Ashwell and Dornier 217 at Orwell (from which i have a BMW engine) it doesn’t match any of them.

It could easily have dropped from an aircraft that continued on it’s way without it – happened everyday in wartime!

I could list all the aircraft that i know it didn’t come from – But i suspect it would take a few pages!

I’m not grabbing at straws to make it Luftwaffe, I simply couldn’t find a match for this thing on any of the contemporary allied aircraft that i looked at, British or US.

When i started checking Luftwaffe aircraft i saw a couple of potential matches in the noses of the earlier Do17s. I know very little about Luftwaffe aircraft so i figured the best option would be to appeal to help from the masses! I’ve seen some good suggestions, not all Luftwaffe –

aeronut suggested Wellington MKV. I have to confess that i had never even seen one until i looked it up yesterday but it does have a similar bubble for the cockpit area. I was unable to find and really decent pics online to look further into it.

CeBro – As far as i am aware the B-29s didn’t make it over here until after the war, though i believe they were based locally at Bassingbourn with B-50s so not an impossibility. Its the dates that trouble me there.

I’m intrigued by the suggestion that it could be some sort of radome or nightfighter related device. I hadn’t thought of that, which is exactly why these forums are a great place to throw ideas around!

I am seeing a Chap tomorrow who lives a few doors up from the lady that owns it (i believe her mother found it). I’m going to see if i can get access to the thing, possibly even borrow it for a week or two and do some proper research.

I just can’t let it go on being a mystery and i feel that if i don’t make the effort to try and solve it now, perhaps nobody ever will! I’m not bothered if it is Luftwaffe, RAF, or US, or even if its post war and somebody got their stories mixed up (though i have no reason to think this the case)! The main thing is to know for sure and to put a label with the thing correctly identifying it.

Any further suggestions will be gratefully received and i will do my best to get some more solid info up on size, shape, construction etc, as soon as i can!

Joeslacks