Thanks Genek, Do you have a link besides "Vintage AR" for those repros.? Ink or paint on brass is what I am looking for. I was going to try my hand at making some(AR-2ax).
Are the speakers AR 3 or AR 3a. On this site is a really good download of how to restore the AR 3a but it also can help you on the AR 3. On the opening page on the left you will see a heading " Restoring the AR3a". Please post pictures of the speakers.
Rick
Also yours might cleanup with Oxi and detergent-try that first-remember not to soak the grill material backing too much-check again the AR 3a restoration guide.
The recommended linen may not be available but there are others-www.123stitch.com-search for 18 count linen-off white. Some are pricey some are more reasonable.
They also could be corroded-very normal on these. Are these new to you and have you downloaded the AR3a restoration guide. It should explain a lot of what is going on with the speakers.