A quick survey of cherry stoners

Dbl plunger type. Schroeter Brothers Hardware Co., St. Louis, MO. HOME cherry stoner, introduced 1918.
Sgl plunger type. Royal Mfg Co., Philadelphia, PA, introd. in 1903.
Sgl plunger type. Rollman Mfg Co., Mount Joy, PA, operated by Michael A. Rollman. Pat'd 11/5/1901. Reorganized as the Universal Hardware Works, 1909.

Sgl plunger type. Edwin D. Parker, Springfield, OH. The "PERFECTION" hand-held cherry stoner. Pat'd 1/27/1903.
Dbl plunger type. Goodell FAMILY cherry stoner, introd. before 1895.

Sgl plunger type. New Standard Hardware Works, Mount Joy, Pennsylvania (formed about 1915 from reorganization of Universal Hardware Works). New Standard "DANDY" No. 20.
Dbl plunger type. Geer & Hutchinson, Peoria, IL. (Apparently the prototype for the popular Goodell FAMILY stoner.)
Rotary type. Enterprise Mfg Co. (Pat'd 3/31/1903).
Rotary type. Enterprise Mfg Co. No. 12 (Pat'd 6/5/1894).
Rotary type. Enterprise Mfg Co.

Rotary type. Enterprise Mfg Co. No. 1 (Pat'd. 4/24/1883).
Sgl plunger type, crank operated. New Standard Hardware Works, Mount Joy, PA.
Rotary type. Peck, Stow & Wilcox "Improved Cherry Seeder" No. 3. Introduced 1900.
Rotary type. New Standard Hardware Works, Mount Joy, PA, DANDY cherry stoner.
Rotary type. "Chop-Rite" Pottstown (NY?)
Plunger type. Goodell FAMILY stoner (?) in action on Antiques Road Show.
Ganged plunger type, old and modern.
Rotary type. Cast iron with legs (like yours!).

Modern examples of hand-held plunger type.
Modern example of rotary type.