Yes, ---- Permissible handguns that are NOT on the handgun roster: Single-action revolvers​ that have at least a 5 round capacity with a barrel length of at least 3inches and an overall length of at least 7½ inches are permitted. budsgunshop.com/feeds/state_reg/california_restrictions.pdf

Quentin, yes Sir. CA has a Grand Father Clause on Single-action revolvers ​that have at least a 5 round capacity with a barrel length of at least 3 inches and an overall length of at least 7½ inches. Details under Permissible handguns that are NOT on the handgun roster here : budsgunshop.com/feeds/state_reg/california_restrictions.pdf

This Pistol is not on the CA DOJ Roster but it IS LEGAL based on the revolver off roster exemption.
"​Permissible handguns that are NOT on the handgun roster:
✔ Single-action revolvers ​that have at least a 5 round capacity with a barrel length of at least 3 inches and an overall length of at least 7½ inches are permitted."
This Pistol is a Single action, 6 shot, 6½" barrel and an overall length of 13½"
Your good to go.
budsgunshop.com/feeds/state_reg/california_restrictions.pdf