Yeah they did. The #7-BG and #8-BG appeared in 1959, same year as their first bass/guitar doublenecks, the #4-BS and #5-BS:
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25-1/8" scale.
Regarding other vintage models that qualify:
- from Japan, a Guyatone EB-1 and a Kingston, owned (at the time?) by
@Rainus and
@ejaggers respectively, here
Guyatone 24.5" Super short scale Eb1 bass
- a Mosrite (Dobro) D-100X Californian bass (whose caretaker,
@ChristoMephisto is a member here)
Mosrite Dobro Bass - mosriteforum.com
@MakoMan has also experience with one
Guitar Scale Acoustic Basses
That would be me. Have you bought them and found out the hard way? If so, I'm sorry to hear that. TBer
@kohanmike reported that the winding length of the La Bella/Gold Tone MBLS flats* is 28" ball-end to silk, which I believed to be plenty for any ultra-shortie but,
from the looks of it, the Kay has quite the afterlength between the floating bridge and the very small trapeze tailpiece, increasing the length requirement substantially.