Double Bass String Identification Help Request

[daniel9.7]

I tried out a bass yesterday & really enjoyed the strings it had, but the owner knew very little about the bass or the strings. I couldn’t find anything in the online string identification guides that matches the set. The strings look fairly old. All 4 are solid black at the tailpiece.
pegbox: E = greyish, might have a slight yellow color on part of the silk.
A= almost no silk remaining. What’s left looks kinda silverish
D=dirty dark grey
G= green
Thanks in advance!

 

[Francois Blais]

Is there something embossed on the balls?
Did you take photos of them too?

 

[daniel9.7]

Thank you, Francois. The ball ends didn’t appear to have any identifiable markings, but I’ll post a photo here. The strings look very old. There is actually a green patina between the bridge and the silks at the tailpiece.

 

[Francois Blais]

The balls look similar to those used by Super-Sensitive strings. (like Red Labels)
I’m wondering if they could be old Lycons, that had blue silks if I’m not wrong.

 

[Sam Dingle]

maybe those thomastics no one uses, the Prazison? i had a used set once sitting as backups that had those silks

 

[Francois Blais]

But Thomastiks don’t sport hollow balls, Dominants excepted.