Transferred from the Department of Commerce
162mm long, 30mm diameter mouth; ca.1920; experimental; brass painted black.
- Country of Origin
- United States of America
- Pioneer Instrument Co.
- ca. 1920
- INSTRUMENTS-Flight Management
- Copper Alloy
- Possible Paint
- 3-D: 16.2 × 5.4 × 5.1cm (6 3/8 × 2 1/8 × 2 in.)