I was under the impression that Brunswick developed and utilized the War Time Joint material. I had not given any thought that other cue makers of the time would utilize the material as well. It seems reasonable that when the government seized ALL the brass for the war effort, that other cue makers would use an alternative, and the Brunswick material evidently would be desirable replacement. I recently acquired a pool cue with the war time joint material. It appears to be made of ebony or African Black Wood. I have been unable to identify it, any help would be greatly appreciated.