Help ID this retro cromo dually

[Rosco pico]

hi brains trust- wonder if i could get some help trying to ID this bike please?
i picked up this lovely one recently- cromoly frame, dual suspension- stx rc RD, formula hubs etc
dont think it is a giant atx
i've had a couple of people suggest it could be an early jamis or wheeler or apollo
grateful any insight

thanks

 

[Rosco pico]

bottom bracket stamp

 

[Suprachrgd82]

It looks a great deal like a NordicTrack VX 4000 or VX 5000.... Very obscure.

https://www.retrobike.co.uk/threads/todays-ride.303296/page-515#post-3611849