While I can't give you an age of your speakers I have an original pair of Beta's (S/N 1199 & 1200) that I bought new in the early eighties. Mine have the Signature Series designation. I know these speaker went through at least three upgrades denoted by MK II, III, and IV though I don't know when they stopped producing them (assuming they have stopped!). I've used them very successfully with a Creek integrated amp for all this time. A few years back I had to replace both woofers and Fried had them in stock, cost me around $100 to replace them. They make a real nice budget speaker or for a second system as I use them. Hope this helps!
