Lt. Colonel (ret.) Ilias Kotridis has positively identified a photo of a Greek bunker, which was shot by an unnamed German soldier back in April 1941.

Then and now: Arpalouki bunker complex, April 1941 – April 2019
Then and Now, WW2 in GreeceBy Pierre Kosmidis

Arpalouki Bunker Complex, located at 41°20’54″N 23°15’35″E |
By comparing the black and white photo with a colour photo Lt. Colonel (ret.) Ilias Kotridis shot recently, it is obvious that this bunker -minus the gun- is located at Arpalouki bunker complex.
Even the battle damage, bullet holes are still there, 75 years after the German offensive.
See for yourself!