I have photos of COD's barometer and it's missing. I have acquired several to replace it. The ones, like your eBay version, I have acquire have solid faces. The ones in the photos from WWII show an outer ring with the inch scale, but have a clear inner circle to show the workings. I will find a photo of our original and post it. One may have been mounted in the CT, but the one for certain was on the diving station, between the shallow diving gages and above the deep water gage. The ones aboard COD and most other WW II era boats were painted black. This one may not have been aboard a sub. Now the snorkel boats had altimeters in the wardroom so when the snorkel dipped, you could tell how bad the sub atmosphere was!
