You're missing a carriage bolt that holds the telephone dial in place. Goes through that square hole in the upright and through the center hole of the dial. When you tighten it the pin in one of the outer holes holds the angle and then a similar pin in the clamp that holds the spade arm is held by another hole. seems like you're missing some parts.

Whether it's genuine W & A (who made most of the Gretsch hardware) or a copy is hard to say.

I agree with what K.O. says! Also, my educated guess is that this is an MIJ copy!

-Mark

My experienced guess is that the original W&A tom mount had some parts from one or more other mounts (anyone's guess as to what brands) kluged together to make the thing work again. Over the years, I've had to do this for rail mounts, cymbal stands,hi-hat stands, and bass drum pedals. If the replacement parts were not original brand, I never bothered to note what brands they were. If they worked---they worked.

Thanks guys.

I found some pictures of this mount on 60's MIJ drums, an Apollo and a Stewart. The style of rail mount look like those provided by the OP.

-Mark

idrum: Thank you for taking the time to post those pictures. Those certainly look like mine. I am convinced mine is a MIJ copy of the Gretsch. pretty good copy tho!! The crazy thing is that it fits the gretsch hole spacing perfectly and that the post looks EXACTLY like the Gretsch!