I've scanned a number of vintage V-2 rocket engine combustion chamber photos. The V-2 was known during development as the A-4 (or A4), for "Aggregat 4", German for a group of machines, devices, or motors working together.

The first photo's caption states that it's an "R&D" combustion chamber, even though this is the type of engine which was in the final V-2 missile. Although the text of the document from which I scanned this photo does not elaborate, I know that the German rocket team was working on a flat-faced injector to replace the 18 burner cup design, but they failed to develop a stable configuration prior to the design freeze imposed on them by those in charge of actually producing the missile. Thus, in a sense this configuration is an "R&D" combustion chamber.

Click image for a 2438x4745 pixel version of this image in a new window.
From page 29 of Technical Data on the Development of the A4/V-2, located in the private collection of Dave Christensen (also available from the NASA Technical Reports Server); alternate link.
Scan and restoration by heroicrelics.

And here's a photo I'd not seen before. As with the photo above, the accompanying text fails to elaborate on the caption, which calls this a "production" combustion chamber. My initial guess was that this was one of the engines the rocket team was testing with a flat-faced injector; years later, I found a copy of this photo in the USSRC archives, on the back of which someone had written "Advanced rocket engine of A4 (V-2) [Single injector plate - did not fly - 1944]".

Obvious improvements include the lack of burner cups and a single (or perhaps two, if one is located 180° around the manifold) alcohol inlet near the exit plane. The shape of the bottom portion of the combustion chamber is very similar to the one above, and it retains the film-cooling manifolds and the four film cooling pipes to supply the manifolds. However, the shape of the upper portion of the combustion chamber differs a good deal, presumably because it was not necessary to accommodate all those burner cups.

Click image for a 3475x4653 pixel version of this image in a new window.
From page 32 of Technical Data on the Development of the A4/V-2, located in the private collection of Dave Christensen (also available from the NASA Technical Reports Server); alternate link.
Scan and restoration by heroicrelics.