I had to go dig out a front plate on a 100, you do have the light to dark on the shutter and it also has film speeds 75,150,300, and 3000. I do remember fiddling with those, I do not think the 104 has those. A few years ago the 100's were fairly cheap, everyone was looking for the 250 series or the pros. I have been trying to buy another 100 for my youngest daughter. Also if you have not found the Land List it has all models shown and specs for them.

http://www.rwhirled.com/landlist/landhome.htm

David