Masada Japan 70's bass were built by?

Can anyone tell me how to identify who built my 70's Japan Masada Performer bass?

It is a Fender style maple/rosewood board neck/headstock but unlike Fender, the trussrod extends 1 inch into the body cavity with a hexscrew adjustment and the dot markers appear to be copper.

Very nice fretwork in terms of the fret ends and a very good looking curved rosewood board that measures 3/16 thick on the edges and 1/4 thick in the middle.

The neck plate is 4 bolt with no 'Made in Japan' or serial number.

The body is a maple center block with thin walnut strips and wide ash outer wings with no pickguard.

The rest is basically P copy but the pickup is a hotter wound with ceramic bar magnets.

I am trying to identify what factory this bass came from.

Thanks in advance?

 

I have to figure out how to load pics from my Samsung Galaxy....which I can send to a phone or Facebook easily.

 

That's it!

Is this your bass in the pic?

I cant see the truss rod extending out an inch like mine though.

 

Anyone else own a Masada Performer Bass?