Superwound base guitar string help

[tdibgd]

Ok can anyone tell me and help me i have a bunch of bass guitar string seven-o-seven, and i think the company who made them are from england the name is superwound  the case is orange
the unique music string
i have i think 100 thease bass string set can anyone tell me are they good and how much they worth i have something like 707mb set, 707md set, 707lc set, 707s set, sfm12 set itd...
if you can help me or some want to buy them contact me
tdibgd@gmail.com

[12stringwilson]

I believe Superwound was a sister brand of Rotosound. The Superwound brand no longer exists. I think Superwound strings had exposed cores over the bridge saddles...much like Rotosound's piano bass strings or La Bella Super Steps (which fit nicely on Ricks and Wals!).

[dfung60]

Yup, Superwound was launched as another brand name of strings from the Rotosound factory.  They had the same address back then.  
 
Rotosound still makes piano-string design strings as the PSD sets.  They are the same as the old 606 Superwound sets (stainless round wound).  707s were flatwounds, must have been pretty rare.  I loved the 505s which were the best pressurewound strings out there.
 
I think Superwounds sound fantastic, but it's challenging to get the right fit, as the length of the string past the bridge pieces is really variable.  You also need to do some special setup on the bridge height to make up for the exposed core end.
 
David Fung