Lower section SR-9

We continue with the lower section.

The bottom plate has been removed (left). Once again a plate with two tiny slits appeared (right). This time a steel one and a “normal” tool did the job.

The lower prism and its positioning parts are removed. From left to right:
clamp for the prism; the bottom prism; the flat spring that presses everything together; two tubes that guide the image from above to the eyepiece (ocular). Fortunately the prism is undamaged and free of any mould.
This configuration is familiar to me because a Pz.W.B.F. uses the same principal.

Next phase is the removal and cleaning of the ocular with the reticle. Two tiny locking screws are removed, but the eyepice does not want to surrender so far.

Tape them or you might loose them.

The outer casing of the lower section has been removed. I was happy to find some grease that must be 75 years old. The black tube right is the main support for the lower section. The light coloured bar that leads up to the top, is also visible on the right.

The further I get in the project the more I am convinced that someone was here before. One big screw was damaged but the tool of the day solved the problem.

This is the top end of this section, once more two drying cartridges and a thick glass plate.

Here the lower part. I call this the fishing rod.

This is the central tube of the lower section. We were surpised to find a glass part in the middle of it. It is fixed by three screws, one is visible in the middle of the photo.

Is it plain glass of some kind of lens?.

Here is the answer, a single lens with two parts glued together. It’s fine and needs only outside cleaning.

Today the ocular surrendered. A leather strap from a Goertz 8 x 30 protected the paint and a pipe wrench did the job. The slit in the left part allows the light from the illumination cable to shine on the reticle.

Second from the left is the glass with the reticle (cross hairs). It is fixed by the tiny screw on the right.

Some prudent cleaning and it will be clear again.

The last lens was removed and cleaned.

For the removal of the last obstacle we needed a new set. The smallest one, in front, is 0.8 mm.