Hi all. Just collected these: They're obviously Yamaha as they have a 'Yamaha' badge on the grille cloth and Yamaha were the only manufacturer making those woofers way back when. I didn't have much time to look at them as I had to chuck them in storage but will hopefully have a closer look over the coming days but there wasn't any obvious model numbers on the rear panel. They look similar to the vintage NS-20 & NS-30 however they are 'portrait' layout whereby these are 'landscape' so are wider than they are tall. Dimensions are 915W x 750H x 350D (36"W x 30"H x 14"D) Either way they're definitely interesting beasts. BIG and heavy with a solid timber carcass but a particle board rear baffle that will need replacing as it's gone crumbly. They have wear & tear but with a bit of TLC they should come up a treat! I'll report back here once I've tested them and had a closer look. In the meantime, if anyone can ID this particular model then please chime in. Thanks!