Item sold on 2023-04-16 - Shipped on 2023-04-17
Shipper: Harp Pack - USPS/Fed Ex
A U. S. Army Time Interval Unit generates a 1 kHz tone lasting 7 seconds per each minute and was used to help make pilot balloon observations for tracking the speed and direction of wind currents.
Size is 8" wide, 6.5" deep and 6.5" tall.
Please view 15 photos at full screen size for best detail.
We carefully pack and ship Fed Ex or USPS depending on size and destination. Shipping charge added at check out.
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Item # 43942
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