M.F. Christensen Slag
M.F. Christensen & Son Co. · 1904-1917
Identification summary
M.F. Christensen slags are the earliest machine-made marbles. They are distinguished from later manufacturers by their 'single-stream' production method, which resulted in a single cut-off mark (pontil) and a characteristic '9' or '6' swirl pattern.
Visible record
- Maker candidate
- M.F. Christensen & Son Co.
- Era
- 1904-1917
- Pattern
- Hand-gathered Slag
- Rarity assessment
- Uncommon
- Condition assessment
- Near Mint
- Size
- Standard (5/8")
- Material
- Glass