I do brush electroplating. To get the effect that I wanted for this clock I used a soft gold solution and kept going over it many many times, and used a lot of gold. The original gold on these clocks test as 10 to 14K, the gold I use is 24K and shouldn't tarnish. I should note that many of these clocks that looked like they've had the gold washed off of them just need a proper disassembly and ultrasonic cleaning to bring the gold back to life.
I would call it spelter. The gray mass that was holding one of the breaks together was jb weld. I removed it and used solder as well as drilling small holes through the parts to add wire for support, then filled the cracked still showing with more solder so I could plate over it.
This one was a count wheel bell strike, and I believe it was from Japy. It's now back with its owner so I'm unable to take pics.