Historical Watermarks on Loudspeakers.

My Spendors are now 52 years old and with new bass/midrange drivers they continue to excel. The cloth on the front of one has a small tear and I decided to replace both with some material I bought on-line. Years ago, JBL had really startling foam front panels which looked really modern - the colour I particularly liked was Red. However there were some fabulous colours to choose from - obviously made in China., given the price is really, really good and pretty similar to those JBL's.

I have yet to fit the material as I can't yet decide whether to strip off the old material (the tear isn't that obvious) and use the plywood frame, or keep them and make up some replacements.

This job will have to wait as we are about to exchange contracts on our new apartment. However, when settled I shall get the job done, along with removing some water - marks where plant pots have left rings in the veneer. They aren't bad and the veneer hasn't lifted so I should be able to rub them down and re - finish them.

The question is - what type Lacquer/Varnish/oil have Spendor used on the Teak Veneer?

If anyone knows the answer, it would be much appreciated.