Help To Id German Ww2 Aircraft Panel ??

[RELIC1000]

Hello All
Can you help me identify this panel. It came from Russia and was recently recovered from a crash site. It is in great condition. The outside has two access locks and the words Auf and Zu. The paintwork is a dirty off white / grey colour. The lock castings have the numbers :

Ju N 16410 and 1R3115

The aluminium parts have component numbers all prefixed 540

540 1605
540 2601

The outer skin has 111241 stencilled on the INNER FACE. There are several "OK25" inspection stamps on it.

The aircraft carashed near the Russian city of Pavlovsk. The panel has a part of a hinge (?) at one end stamped 540 2201

There is also a triangular swivel assembley made of plated metal near the hinge. Some wreckage (allegedly from a Ju88 is for sale on ebay and there is a similar triangular swivel amongst those items.

Can anyone help - Anyone a Junkers expert? The panel has two corners which are a smaller radius than the others, and is slightly convex. The locks still pop in and out.

Would appreciate any help . Can send better photos upon request.

Jim