Rare WW1 Tesla patent Air Speed Indicator Airplane Gauge Instrument by Waltham For Sale
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Rare WW1 Tesla patent Air Speed Indicator Airplane Gauge Instrument by Waltham: $188.99
WW1 Era dated Tesla Referral patent 1916, made by Waltham Mfg Co. , air speed indicator gauge unit, has wear and aging, sold as is as shown. the dial arm adjuster for miles & 10th\'s of miles works adjusts, will zero out to 0, see photos of doing that. measures in size 6\" length by 5.5 \" width