Two piece construction - Made in sterling silver.  "USN" is in the top bar with "AVIATION REPAIR OVERHAUL UNIT" on the hanging planchet.  1 3/4 inches tall by 1 1/4 inches across in size.  Marked on the reverse side "STERLING".  Pinback with a roll locking pin catch.  Artwork has a six handed mechanic with bug antennae, standing by a radial engine on a stand.