In article ,
"R.H." wrote:

http://puzzlephotos.blogspot.com/

219 is easy -- it's the top of a dry cell battery. Hard to tell the
size, but I'd guess a AA.

213 looks like some kind of mollusk shell.

215 looks like a pressure relief valve from a steam radiator.

217 looks like some kind of flaring tool, or maybe a grommet setter.