Please Help ID Shower Valve Stem

I need to replace the spring/rubber seats on my shower handle valve stems. There is a handle for hot and one for cold. I do not see any identifying marks that would indicate the manufacturer. I have included pictures to assist.

There are not many true plumbing stores where I live and trying to find something from the big chain stores has not proved successful. I took a stab at some that 'looked' like they would fit, but they did not seat properly which prevented me from successfully reassembling the valve stem.

The closest thing that I can find (through some online references) is possibly a BrassCraft STD2619 (OEM Ref# 050-30), but I'm not convinced enough so I thought I would see if anyone here on the forum would be able to assist in identifying the stem so that I could find the appropriate replacement spring and rubber seat.

Any help would be greatly appreciated! Thank you in advance!

The seat looks like Delta but the spring looks like Valley.

Sterling, possibly. Looks like a match here. A3270.

OK folks, I have the same setup that is leaking. I removed the stem shown and I'm left with the white seat in the valve. I purchased the all brass replacement shown on the right....now, a couple of "after the fact" questions....

- do I simply "pull" the white seat out of the valve body?
- if yes, do I disassemble the new all brass stem to remove the seat and replace it in the valve body, before screwing in the stem?
- how in the heck does the stem screw in straight (i.e.. the "o" ring part is offset and I can't envision how the stem screws in straight).

Sorry...I'm clearly not a plumber.

Thanks for any advice.

CatPit1

hold the stem and only turn the bonnet as you screw it back in.

Much appreciated. So, Do I first pull out the white seat within the valve body? If yes, any suggestions for how I grab a hold of it?

The part on the new stem with the o-ring on the end is the part you left behind when you removed the old stem.
It's just a an o-ring holding it in place.

just use a wood screw just a bit larger than the hole in the part you are trying to remove. screw it into the hole and then just pull it out.

I ran into one of those fixtures only once. Very odd design.