I think that one thing to remember when looking at dials made in the 1800s is that they were hand lettered, replication by transfer did not begin until the 1880s and it took a few years before most companies made the switch. You could potentially see hand painted dials as late as 1890. Here are my Illinois (the original IWC) from the 1870s and 1880s to show the meticulous work of hand painted dials. The first four are all Model 1s, chronologically listed: an 1872, grade Hoyt; an 1874, grade Miller, an 1883, grade 101 (which I purchased from
@TexOmega ); an 1887, grade 99. The last watch is an 1887 Model 2, grade 5. If you zoom in on the details you can see the variance in line thickness, the subtle differences in how the script is lettered, as well as differences in the markers at the quarter hours, also note the seconds bits on each.