That looks pretty mint.
The "S" designation was more wattage I believe than the B-15N??
The head appears wider to me than I remember my B-15N (early 70's IIRC) or other B-15's I've seen.
THe Reissues would cut it, but the original models would have a hard time cutting through the mix today-
OTOH, if you have a home studio, or can play at low-level volume you're good.
This MAY be of note to some; (hey, hate to go "off-track" but..

)
I "endured" rehearsals for a month- 6 days a week- 4 hours a day- with a Project out of Louisiana wherein the performer took his all-original, every tune must be played as written, note-for-note, VERY seriously. Very.
We rehearsed at extreme low volume- the drummer using what's known as a "cocktail" set- small bass drum, hi-hat, snare and crash cymbal only- and this guys was amazing, a superb drummer, a veteran of James Brown among others...He told me stories of what James Brown expected of HIS rhythm section....Scary!
The Guitarist/Vocalists volume was way low, he sang w/out mike- I played at an extremely low volume as well, the B-15 could easily have handled it-
We absolutely nailed the material, more pertinent to me, as they had and have been together almost 20 years, and-
When we took it on the road, we were note-for-note section-for section absolutely perfect and THEN...
We OPENED IT UP, played at good, strong volume and blew audiences away. Literally.
That's how it's done, and frankly, I've had trouble with many projects and players imparting this kind of discipline and regimen to make the music perfect. 'Course I'm dealing with a lot of wanna-be's and posers from El-Lay at times and NOT
some serious 'mothers from Down South where it all began roots-wise.
When I work my engagements, that is how I've learned to comport the players I employ, and utilize the regimen I learned. It works. Just sayin'
And now, back to our sponsor....
The elusive Geddy Lee SVT!
