Hi,
I have a 195 and also a 340, which was my main camera until I picked up the 195.
I used to use the lighten/darken wheel on the 340 when shooting 125i or 690 - I'd move it to darken a little to compensate for the 125/100 iso film and the camera being set at 75 iso.
I'm never any good at working this out but I guess that means you are overexposing by 5 (?) stops? somewhere on the interweb I have read the stops difference the lighten and darken wheel makes, but I htink all the way to one side only makes one stop difference.
the shutter must be open for a long time if the camera thinks it is shooting 75 speed film indoors?
Anyway I'm rambling and not really helping much - but it is a nice picture and good luck with further experiments.