Please help identify this shower knob and on any ideas how to open it

My shower is leaky slow drip cold water. I am suspecting the cold water knob need a repair. But when I tried to take the knob off from the stem, I could not
find any place to open the lid up. Please see attached photos of the knob and help! Thanks in advance.

Caps screw off and retaining screws are under the caps.

I tried to screw off the cap, but failed. First I am wondering where is the
opening of the cap? Is it the one with the golden screw line or just the
front silver cover? Anyway, I tried to un-screw, either won't work. There is
no anchor point to use any tool. Using hand to un-screw such round shaped
metal cap is slipery and impossible. By the way, can anyone identify which
make or manufacturer of my knob is? I hope to find out more information on
inside structure of this knob.

Use a rug and put a pair of channels locks on chrome piece you will need to be careful not to scratch. If you can get a smooth jaw wrench or strap wrench would be better

Chrome cap SCREWS off. Looks like Delta. I love that vintage of Delta.

Thanks SHR for hints. It is delta. Here I show how to remove the cap:

Wear a rubber glove to increase the friction force when trying screwing off
the cap.