flash Image MBZ 1500

I just acquired a flash Image MBZ 1500 altogether with a Ricoh KR-10x.

I am not much familiar with this kind of flash. I sort of have a global idea of its functionning but I wish I had an instruction manual. On Butkus, there ain't no mention. On YouTube, there is a presentation made by a seller but that doesn't go very far.

I would appreciate any reference or information related to this flash.

Yours,

I found one post on the internet that indicates that Image MBZ flashes may be re-branded Starblitz flashes.

thx for the info !