1981 Weather Balloon ML-541/A/AM – Unused – 5 lbs – Open Package

Could not find any identification on the balloon, but found the exact balloon on a museum site.
Original U.S. military surplus Meteorological Balloon ML-541A/AM. Balloon is unused but packaging has been opened; net weight is 5 lbs. Includes handling instructions for temperature conditioning and inflation procedures. Film thickness ranges from 0.0035" initially to 0.0001" at burst. A rare Cold War-era item ideal for collectors of military meteorological gear or scientific.
Features:
- Model: ML-541A/AM
- NSN: 6660-00-809-5115
- Contract: DAAB07-81-C-1025
- Manufacturer: Kaysam Corp of America
- Type: Sounding Fast Rise Meteorological Balloon
- Net Weight: 5 lbs
- Condition: Unused – Open Package
- Film Thickness: 0.0035" initial, 0.0001" at burst
- Handling Notes: Requires temperature conditioning before inflation
- Use: Atmospheric Data Collection / Military Meteorology
- Packaging: Original, opened
- Era: Cold War / 1980s
- Type: Surplus Equipment / Scientific