Someone wrote a question regarding Sickles and it caught my eye. I have only see it on one piece locally and it was done by and Engrosser here in Cleveland. Brilliant Guy who has a mind blowing hand in a variety of styles. Anywho... I was going to suggest an Engrosser OR Sign Painter may know of any information. My brother who did sign painting had books regarding this stuff.
You might check out Calligraphy Studio in Cleveland, Ohio. It's run by Ben Rubin ( above mentioned) it is possible that his son has taken over the shop) But I think if anyone can help.... it would be him.
hope this helps!
ElizGadus 59