I disassembled my Chamonix 45N-2's ground glass and now can't remember if the grooved side of the fresnel faces the lens or frosted side of the ground glass. If someone knows let me know. Thanks.
I'll be back in town on Monday, and can check mine.
I just checked mine. The frosted side face the lens and the grooved side face the GG (i.e the GG will be on top of the grooved side).