400 year old bell foundry still at it using the same technique. You have to watch on YT. Part 1 Interesting pour. Part2
Bell https://youtube.com/shorts/SAKMp3LnSHw?si=nJSDwCG4jXfq7jkh Valve https://youtube.com/shorts/phvSOfbue24?si=oU7O-1Q0ajXah9DJ