This is an original USN USMC Pilot's  Vertical Speed or VSI Indicator Gauge Instrument. The gauge is in good condition with no cracks.   It is 3 1/4 x 3 1/4 x 5 inches.   These items are being sold as is for the collector. Payment must be received within 10 days of auction closing unless prior arrangements have been made. Buyer to pay shipping.  AZ residents add 6.7% sales tax. If you have any questions please contact me via e-mail before bidding. Thank you for your interest in my auctions