Rehabing antique hand pump?

So today I scored a cool old hand water pump at a garage sale - it's actually in beautiful shape, I thought it was newer! But, there are definitely pieces missing, and I'm curious if it would be worth it, or if I would even be able to restore it to working order. I know you can get parts for hand pumps, including the valve leathers etc...but would they fit an older model? Has the technology changed much in the last 100 years (which is about how old this thing is)?

Here's a few pics of it:

If the leather doesn't fit.....you cut it to fit. That's the thing about pre-plastic, pre-rubber, pre-manufacturing-to-specific-tolerances technology; if you have a piece part that is a little big, you file it down until it fits.