Are my Spendor S6 not S6e woofers original?

I recently bought a pair of used Spendor S6 speakers and the woofers are black. Most Spendors that I have seen have clear
plastic woofers. Can anyone tell me which is the original woofer?
Three sources of info.

QS&D was the Spendor importer for many years, including the period when the S6 was current. You can email them at

Bluebird Music is the new US importer for Spendor. You can email them at

There is also the Spendor interest group on Yahoo. This is a moderated discussion group, so you'd have to apply to join and be accepted. You can start that process at