The only marks I can make out are

Pat’d Dec 6 1884

Pat’’d May 24 1870

WP_20131004_023 WP_20131005_002WP_20131016_0071891catalogcheapratchetbraceno_129

Bartholomew Cheap Ratchet Brace photo is reposted with the permission of wkfinetool.com

 

 

Some More information.

http://www.wkfinetools.com/hUS-borTools/bartholomew/barthol-index.asp

http://www.sydnassloot.com/Brace/Bartholo.htm