From memory these were called the 'Arrow' as well. No way that a design devised in the CBS era to use up unused Bass V stock was somehow prototyped in the pre-CBS era. If you must fake this stuff, at least come up with a convincing back story.
The guitarist in my old band had one of these:
![](http://vintageguitarvault.com/wp-content/uploads/2015/06/fender-musicmaster.jpg)
A tiny wee worn out guitar, that needed a bridge pickup. It had one nasal tone, and that was it.