Rare items like this Everready Battery Company ammeter are amazing to find at a swap meet, but it's incredible to find 2

other cool things that caught my eye at the Qualcomm swap meet

 The below are film canister mailers.. a movie on a reel would be put into it's can, then that can would be placed in the below package, and they would be couriered to the next movie theater

very cool and extremely rare tungsten spark plugs still in the tin cans, and marked Ford