Cool looking speakers. Drivers are Peerless KO50 woofer, Audax 10 mm dome. That woofer (or a variant, they were available with both foam and rubber surrounds) was also used in early M&K satellites and many other speakers. It's a great little woofer, smooth up to 4-5k and can get down into the upper 40s. The Audax tweeter has an undeserved reputation as a not-so-great driver, but that's because a lot of times it was crossed over too low - above say 7KHz it does a pretty good job.