The tanks are great. Many thanks for saving them from some scrap yard.
Water jacket needs a caulk on the circulator inlet, previous caulk let go of the outside wall. Previous somewhere sometime brazed on a threaded coupling instead of leaving it a clamp nipple. Likely the silver solder let go at the wall pass through. No big thing. Easy repair. doodling up the DIY heater circulator to handle my keep warm. Found the parts list for the original Arkay unit. Circulator pump specified is still in production from several manufactures. It was worth the drive over for sure. Stay safe.