TDC Stereo Vivid shutter speeds

[SMD]

Dont know where to post this, as there is no Forum for stereo cameras. Being a RF now it goes here.

So I bought the TDC Stereo Vivid, a fine camera. But the manual is one of the worst I ever read.

Does anybody know what the lines on the dial of the shutter speed are?
The dial has: Bulb, 1/10s, 1/15, line, 1/25, line, triangle (this is 1/35s conf. manual), line, 1/50, line, line, line near to 100, 1/100s.
The dial also can be rotated a bit over 1/100s as well as set to intermediate positions. How does the shutter spee regulator in this camera work?

 

[outwest]

It is a nice camera. I have several stereo cameras and at the age they are now I shutter test all the marked speeds and record the speed that they are really giving and keep a record with each camera. I should add that if the speed is set on a cam rather than a step it is possible to get intermediate speeds but there is no point guessing what they were and what they are now and now that Kodachrome 12 is gone and slide film is so expensive it is possible to use speeds no slower than 1/60 and preferably 1/125 or faster to get better and sharper handheld results than the hit or miss with the slow speeds in the old days.