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Navy Uniforms, Uniform Insignia,
Caps and Accessories circa 1917

Admiral of the Navy in Special Full Dress Uniform 
 
 
Rear Admiral in Special Full Dress and Warrant Gunner in Special Full Dress
 
Lieutenants Evening Full Dress and Evening Dress 
 
 
Lieutenant Dress Uniform
 
Lieutenant White Mess Dress Uniform 
 
 
Lieutenants Overcoat and Boat Cloak 
Lieutenant Undress Uniform 
 
 
Lieutenant Junior Grade Service Dress Uniform 
 
Lieutenant Junior Grade White Service Dress Uniform 
 
 
Officer's sword, scabbard, undress belt and sword knot (all commissioned officers except chaplains)
 
Cocked Hats, Caps and Cap Device
1 Cocked hat, all officers
2 White cap, Lieutenant Commander and below including chaplains (add visor ornaments for admiral, captain and commander)
3 Cocked hat, the Admiral of the Navy
4 Blue cap, the Admiral of the Navy and all flag officers
5 Blue cap, Captain and Commander
6 Blue cap, flag officers, staff corps
7 Blue cap, Captain and Commander, staff corps other than chaplain
8 Blue cap, Captain and Commander, Chaplain Corps
9 Blue cap, Lieutenant Commander and below including chaplains
10 Blue cap, warrant officers, cap device gold fouled anchors
11 Cap device, all officers other than warrant officer 
 
 
  Officer Epaulets
1 Rear Admiral (two stars)
2 Commander (silver oak leaf)
3 Ensign (fouled anchor) 
 
Officer sleeve insignia of rank 
 
 
  Officer metal devices
1 Line
2 Medical
3 Pay
4 Chaplain
5  Professor of Mathematics
6 Constructor
7 Civil Engineer
7.5 Dental
8 Boatswain
9 Gunner
10 Machinist
11 Carpenter
12 Sailmaker
13 Pharmacist
14 Mate 
 
Officer collar devices on service coat
-Showing right side of collar
1 Admiral of the Navy
2 Admiral
3Vice Admiral
4 Rear Admiral
5 Captain, Line
6 Captain, Medical 
7 Captain, Pay
8 Commander, Chaplain
9 Commander, Professor of Mathematics
10 Commander, Constructor
11 Commander, Civil Engineer
12 Lieutenant, Dental  
 
 
  Chief Warrant and Warrant Officer
collar devices on service coat
-Showing right side of collar
1 Chief Boatswain
2 Chief Gunner
3 Chief Machinist
4 Chief Carpenter
5 Chief Sailmaker
6 Chief Pharmacist
7 Chief Pay Clerk
8 Mates 
 
Enlisted Uniforms and Insignia 1917
 
Reference: Uniform Regulations United States Navy, 1913 (Revised to January 15, 1917),
Washington DC, Government Printing Office, 1917