ID these speaker?

[spicoli]

Hi I came across a pair of 15" speakers that are reported to be "guitar speakers"

No source-date code that I can ID. Marked BSR1713-3013 84-05

Do those #'s mean anything to anybody?

[J M Fahey]

Post a couple pictures.

[spicoli]

Sorry - I didn't get pictures- wish I did. If the numbers don't jump out at anyone I'll probably pass.