Can someone identify these speakers?

Can someone identify these speakers? They are pioneer for sure.
There are so many models that look like this from outside but internally different. Please help!


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From an expired Ebay ad:

77-40 Tweeters ..... Up for your consideration is a great pair of vintage Pioneer 77-40 with new foam surrounds. According to The Pioneer Bible, this model of tweeter was available in the follow models -- CS-99, CS-66, CS-66E and CS-66G.
 
The 30-25F woofer was also used in the CS-A77 (1969), a four-way floorstander, but with a sealed enclosure and a lattice grille.

Woofer: 12-inch (30cm) cone type
Mid Range: 5-inch (12cm) cone type
Tweeter: 3-inch (7.7cm) cone type
Super Tweeter: Multicellular horn type

(External Dimensions: 636(H)x 366(W)x 320(D)mm)

The 77-40 tweeters were indeed used in the CS-66, CS-66E and CS-66G models, but in conjunction with a 25-11F woofer.

That's as far as I care to trawl through the Pioneer speaker systems database! http://akdatabase.org/Pioneer/Speaker Systems.htm