Elgin Pocket Watch. It is Model 7, Grade 387, 16S, 17 Jewels. 

Serial Number #23706032
It does start running when wound up, but then stops after a while. Selling as is....

Information from Pocket Watch Serial Number Lookup:
Elgin National Watch Co.

Grade: 387

Manufacturer:Elgin
Manufacturer Location:Elgin, Illinois
Movement Serial Number:23706032
Grade:387
Model:7
Class:110
Estimated Production Year:1921
Run Quantity:3,000
Grade/Model Run:95 of 228
Grade/Model Total Production:357,700
Variant Est. Production:346,700 (16S-M7-17J-ONP)
Size:16s
Jewels:17j
Jewel Material:Ruby & Sapphire
Jewel Setting:Screw-Set
Movement Configuration:Openface
Movement Finish:Nickel
Movement Setting:Pendant
Plate:3/4 Plate
Double Roller:Yes
Barrel:Going
Balance Type:Expansion
Train:Quick
Regulator:Moseley
Hairspring:Breguet
Adjusted:No
Railroad Grade:No
U.S. Patents:596407, 77078, 585025
Data Research:1927/1950 Elgin Serial List
Case:Various
Run ID:11554.387G95.16S2912.167M1086.O5002.P8677.17J1738
Database Version:v52.232