I have two (2) vintage pairs of audio speakers that are designed for boating since they are water resistant. I had worked for Teleflex and these were some of the products that we considered marketing in the boating division. They are vintage but are new, never used.
White speakers - Dimensions are 4 1/2" x 8 1/2" 20 watts RMS 4-8 ohms. The labels in the original boxes read "Poly-Planar Speakers, ERA Acoustics Corp., Moonachie, NJ. $15/ea or $25 for the pair
Brown speakers - Dimensions are: 13 1/2" high x 16" wide. I have no specs on this pair. $10/ea. or $15 for the pair