This is an original  civilian general aviation two piece radio receiver set type 402A. They are 4 x 8 x 3 inches. I do not know if they still work.This item is being sold as a collectible.  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.