Can someone help me ID these mystery Eminence speakers?

Hey all! First time posting here!
I'm having a hard time finding any information on these speakers. A local is selling an acoustic 106 cab with these white cone eminence speakers that are stamped "13-15" with a date "67-7445."

From what I can gather the 106 came with two speaker variants. One with a model number 15FABA6B and another, white-domed speaker numbered 130040-x(A,B,D).. well this cab doesn't have either of those...just a white coned speaker with square magnet stamped 13-15 and dated 67-7445.. so 1974, week 45... but what is this mysterious 13-15 stamp?

There doesn't seem to be any information on these speakers.
Although there are some pictures on ebay and reverb of a couple 12" guitar speakers that are tagged 13-33 or 13-18.

I'm really curious about these speakers so if anyone has any information I would very much appreciate it.

I've attached the images below. thanks

 

bump.
also i made a typo.. i meant 13-14 not 13-15

 

That's a good point. I thought there was a chance that they might have been replaced with era specific aftermarket speakers. No reason to suspect that apart from the fact that they have a different serial number lol.

Im gonna make an appointment to see/test them. will update.

 

thanks! I'm going to move forward then. Much appreciated!

 

any particular reason why they wouldnt be stamped 15FABA6B or 130040-x like all the other acoustic 106 cabs?

 

That's interesting because I couldn't find any information on the 13-14 stamp but there probably is another stamp somewhere. ...
Well i'm going to check out the cab later this week so hopefully it sounds good. I have a MKII Acoustic B220 from the 80s and i've been itching to match it with a vintage acoustic cab
I've seen a couple 406s pop up, but the speakers on one were replaced with 70s pyle drivers and the other one is beat to sh*t lol. I figured a stock 106 would be my best bet.

 

Seller told me it was a "farm" find and that the cab has been sitting for 30 years or so.
yeh hopefully everything works okay.. I'm taking an amp to test it out.. obviously if something seems out of wack I wont get it.

Yeh the smoke in the tolex is tough to get out. if that's the case i'll just offer a lower amount. will update later today ;b

 

Yeh seems to be two groups. One that thinks they don't have enough power handling and another that thinks they're really powerful cabs lol!
I've personally never tried a vintage Acoustic bass cab , so I hope it measures up to my expectations lol

 

Update: So I got the cab. I was able to test it out before buying, no issues.. got home and spent about an hour with it last night. Overall I'm very pleased with the sound.
Cant wait to hear how it sounds at rehearsal

Its apparent that the cab was in storage for many years without a dust cover, as it has acquired a considerable amount of dust. I was able to clean it a bit, but will need a deep cleaning..

there is some wear and tear but nothing too major. Doesn't appear to have been from a smokers home.
I'm very happy with it and it will be my main cab moving forward.