I have been collecting Randalls' for a while, but I am still confused sometimes about what constitutes a "Separate S". Does it have to be a certain distance from the right hand scimitar on the stamp, or does it just have to look like it wasn't stamped at the same time?

Does anyone know why the "Low S" began, and what periods was it used?

Thanks guys....Close-ups will certainly help me and the newbies.

Dubie Baxter