A really good looking 992B, it does have hairlines on the face, in a really nice original Hamilton case.
The following comes from Hamilton identification chart.

All of the watches I am putting on are very nice running watches.

Manufacturer:Hamilton
Manufacturer Location:Lancaster, Pennsylvania
Movement Serial Number:C236358
Grade:992B
Model:5
Estimated Production Year:1948
Run Quantity:54,700
Grade/Model Run:10 of 32
Grade/Model Total Production:531,750
Size:16s
Jewels:21j
Movement Configuration:Openface
Movement Finish:Nickel
Movement Setting:Lever
Plate:3/4 Plate
Adjusted:Yes
Adjusted # of Positions:6
Adjusted to Temperature:Yes
Railroad Grade:Yes