I've been searching for a nice 12s dial for my Illinois Grade 605, and finally found one.
Will sell this for what I got it for - 27 including shipping - or will trade even money for a comparable dial to fit a grade 605. That dial is about 37.7 dia.
The only problem is it's a different diameter - about 2mm too large. It measures out at 39.4mm in dia, the 605 has a raised edge on the movement and the dial for it has to drop inside the edge.