Hans replied with his typical Guild genius and prowess, and I will never truly be able to replicate the original strings, but check out how cool this info is...Thank you Hans!
Hello Woody,
Thanks or your email and sorry for the slight delay i getting back with you. Too much private email these days!
The strings that your guitar was set up with were most likely Guild's own 'Angle Wound' strings.
Obviously these were not made by Guild, but I'm not 100% sure who the maker was.
My research leads me to believe that these were specially manufactured for Guild by E. & O. Mari, the makers of La Bella Strings.
The number for that particular set of strings was M-410 with gauges .013 - .058.
Smaller guitars were usually set up with the L-310 set with gauges .011 - .053.
Sincerely,
Hans Moust
Now the good news. As Ralf so correctly suggested, I can and should string my D25Br with medium gauge strings. I mean if the Br left Westerly with .58s, holy cow, I can totally survive .56 for the low E.
Anyone care to weigh in on which old school string maker can match the alloy of La Bella mediums? I am real close to netting this elusive Wilson Snipe...
Wait, before Sandy tells me to do a google search, I did one myself, and La Bella strings still exist !!!!!!!!!!!!! What ????????? The below is most likely the closest I can theorize as the string type/gauge that left Westerly.
http://www.labella.com/products/40pm/