Speakman pats

My house was built in 1929 and has Speakman parts in the shower and bathtub. The valves are leaking and a plumber told me that I need to find seats for the valves. I can't seem to find parts to fit it. I saw a diagram on an old website of yours that gave me numbers for a seats for a 1915 speakman valve. I wonder these part nubmers will work my my valve? The part number was 05-0451.

piece of cake. google Speakman 05-0451 A parts site will come up. Enter the 05-0451 in the seach box of the pdf. pops right up.