Fender

* Champ 6-String
* Deluxe 8-String
* Dual Professional
* Stringmaster D-8, late 50s
* Stringmaster D-8, 1953
* Stringmaster T-8, late 50s
* Fender 400 Pedal Steel, early 60s

Rickenbacker

* Rickenbacher Electro Bakelite 6
* Rickenbacker Electro D-8
* Rickenbacker Triple-8 (Curly Maple Cabinet)

Other

* Gibson BR-6
* National S-6 w/ Tuning Lever
* National Model 50 D-8
* Volume Pedal with Taper Control
http://www.hawaiiansteel.com/instruments/diagrams.html

I took a "poll" of my Prewar Ricks ...

The capacitors were those "tube" like ones:

The brown TIGER ones:

2 were .1 MFD 400 VDC
7 were .05 MFD 400 VDC
1 was .05 MFD 200 VDC

The orange SPRAGUE ones...

2 were .03 MFD (no VDC listed)

The potentiometers that that were labled said CENTRALAB (Milwaukee) .... most had big black cases ... one had a visible marking on the side that said 500K (volume).

But several of the big black ones checked out to be just under 500K ... a couple were around 250K.

Only one of the smaller metal ones (later prewars) said 500K (tone)... the others were not labled but were 250Ks.

It appears Rickys used whatever was available at the time ... like their tuning machines (strips, metal butterbeans, plastic ovals) and knobs (octagonal, arrows, flying saucers)