Pottery & porcelain · a closer look
Robert H. Sperry Robert Sperry mark: Sperry 61
Mark details
- Period
- Undated
- Wording
- Sperry 61
Dating cue
Source example dated 1961; this is not a mark-use interval.
Pottery & porcelain · a closer look
Source example dated 1961; this is not a mark-use interval.
