Here's mine, all original acoustic version. Your's was definitely electric at some time in the past. I have had this instrument longer than any other I own, probably got it about '87. If I recall, the electrics came with Dearmond pickup. By the "Harmony" name on the pickguard, your's would be one of the later models.
They are actually pretty good mandolins in their own way. The sound is more "dark honk" than "ringing chop" but they play well and I like having a differently voiced mandolin. They have a mini-cult following. Used by Yank Rachell but their high point was their appearance in Led Zeppelin concerts.