Need help identifying a brass PEX fitting

[Dan Parrish]

This house was built in 2001. We just removed 2 fittings and replaced them with Sharkbites due to some corrosion. (No leaks.) I'm trying to identify who made them. One side says F1807C and PEX. (No letter in front of the PEX).

The other side has a symbol that might be the logo of the manufacturer. Does anyone recognize it?

I'm trying to determine how prone these particular fittings are to dezincification.

thanks!