'Will someone explain whether the slow shutter speed dial was a standard feature on the Ig???'
These were only produced in small numbers. Both with and without slow speeds are rare. One is rarer than the other but not sure which! Both are collectable.
'Why Leitz raised the top deck on this model is beyond me. Unless there are some mechanicals to synch a flash underneath, I'd prefer the top deck of the Ic and If.
Back in the day, this puppy may have seen some use mounted to a microscope with a Visoflex.[/quote]'
If you wanted you could mount both V/F and R/F on at the same time. Scary!
Yes, I think the later shutter 'kit' is higher. This is most noticeable on very late factory conversions of original IIIs. The top housing can be quite different.
Ig, MDA, Post Leica, there seem to be some around Ebay at present...
Michael