String ID

[Aaron]

I just bought another bass on a whim. I'm looking to change out the strings, but I'm not sure what the E-D strings are. For all three the tailpiece silks are black (or very dark blue/purple). At the peg box the E is solid black, and it looks like the fat part of the A and D are black, but the ends are light blue/cyan for the A and red for the D.

[Francois Blais]

What is stamped on the balls?
They look like Pirastro Ultra-Sensitive strings, which were discontinued a long time ago!

[Aaron]

They all have a zero on one side and 4, 3, and 2 (E, A, D) on the other.

[Francois Blais]

Originally Posted by Aaron

They all have a zero on one side and 4, 3, and 2 (E, A, D) on the other.

In fact, it's an "O", and means orchestra-tuning. (solos would get a "S" as you guessed)

However, Ultra-Sensitives silks were black for orchestra-tuning and bright blue for the solos.
Furthermore, at the peg-end, Pirastro's tone ID is:
E: green
A: black
D: red
G: brown
The string on the usual A peg has some green, and the E seems black.
I'm puzzled!

[Aaron]

I searched for black/black on Quinn Violins' string search and Thomastik Precision was the result. I heard that Precisions have higher tension than Spiros, but these strings feel pretty loose to me.

[Francois Blais]

Thomastik don't use the same balls shape.
Furthermore they don't use different colors at the peg ends.
Definitely not T-Is.