I don't think it is too terribly different than the later models. It is direct drive instead of a belt drive. The wiring is probably a little more "primitive" but I'll bet the basic concept of operation is very similar. I've a feeling that the power supply (I think its a high voltage supply) pictured at the top is not operating quite right. I think it is what was called a multi-vibrator type supply or sometimes referred to as a "chopper" type. The flash tube does "flash" part of the time, but then I'm thinking the HV supply drops and the tube stops firing?? Vacuum pump was inop when I got it just like everything else was. Got the vac pump working fine now, RPM meter responds to varying speeds but isn't 100% accurate.
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