My grandfather's watch was a 1910 Elgin, Model 7, 7 jewel, open face, SN 15748228, grade 291, size 16s, class 110, with a gold filled case by Jefferson Case Co (middle photo above). It has an unusual design on the back of the case and I'm not entirely sure which way is up. However, I did find 2 watches on-line which have the same design. One was made by the Brighton Case Co and the other by the Philadelphia Case Co. (first and third photos above).
Has anyone ever seen this design before? Do you know which side is up? How is it that 3 different case companies have the same unusual design? Or were these 3 companies once the same? Anyone know who may have created this design?
I would also like to have my grandfather's name engraved in it if I knew which way the initials should go. Is there a reliable engraver who can use the same font that would be consistent with a 1910 watch?
Any help would be appreciated.