Star Brass 5-Chime Whistle Restoration *PIC*

I am almost done now. Yesterday while at the zoo railroad, I took it completely apart. I took apart, cleaned, and lapped the valve. Cleaned all of the parts really. The last time that whistle was worked on was probably the mid-thirties or something. Unless it started to sound REAL bad sometime before 1956.
I painted the bell part black with Rustoleum High Temperature spray paint. The only thing left to do is replace the very worn out valve spring. When I took it apart, I saw that to make up for the bad spring, the U.P. just put two washers behind the spring.
The way I have it now with the spring only, it doesn't even close the valve all the way.
The spring actually might be just fine, it's the valve plug that holds the spring, it is supposed to be made up of two parts, with an adjusting screw for spring tension. At some point that plug was cracked and brazed up into one piece. Thus the washers were used.
I just now realized that! The spring is probably fine!