Do you know the driver compliment in this particular unit. They were not all the same. The critical driver is the huge 375 mid range compression with its large horn.. The others all count of course. The cross overs are frequently in need of work in these older speakers.
I own a couple of pairs of the cheap speakers of that era. With the 075 tweeters and extended range D130s and D131s mids/woofers.
What do the veneers look like. All that matters in figuring a price.