Thank you everyone for responding... You have all been very helpful.

The bar came off a 1982 Maruishi, and is unbranded. ( Could be an add on, upgrade/downgrade.)
The measurement is from the drop, taken diagonally with the end plug taken out.

I wanted to save some moolah by using it, seems I'm better off splashing the spondulicks on a more modern bar.

Thank you !