Samuel Bryan Jerome was active in the clock-making industry, first working for his father, Chauncey, and later on his own. Although not much has been published on SB Jerome, he left his mark with several design patents for cases. This clock uses a sash (door) based on Design Patent 4,422.
Label of Jerome & Co. (SB Jerome principal owner) showing patent date of Oct. 18, 1870. Two versions of this label have been seen, one printed on wood and the other (like this one) printed on thick paper or cardboard.
8-day spring-driven movement by Noah Pomeroy (front)
8-day movement (back)
Drawing for Design Patent 4,422 for a sash for clock cases
Specifications for Design Patent 4,422