Found this on one of the gun classifieds sites this week:
A twin 40mm Bofors mount from the ex-USS Downes, DD-375. In case you don’t remember Downes, a Mahan-class tin can commissioned in 1937, she was present at Pearl Harbor on a day that will live in infamy. And she got quite a licking.
Well she was salvaged in the most real way possible. Her equipment that could be saved was removed and installed in a new hull (with the same hull number!). She was recommissioned in late 1943 and finished the war, being broken up in 1947 for scrap.
The only thing is, Downes didnt carry Bofors at Pearl as far as I know. The gun had only just been approved for IOC a few months before. Most of the AAA guns in action on Dec. 7th were water-cooled Browning M2 .50 cals and the downright horrible 1.1-inch quad. However after her rebirth, she did in fact carry a pair of twin 40mm guns aft (in place of one of her 5-inch guns) for her return payback cruise to Japanese-held waters in 1944-45.
The bad thing is the guy wants $25K for them…and they are dewatted. Still, kinda cool piece of history, and it doesn’t show up in the lost cannon wall of shame.