Original U.S. WWI Stewart Model 149A Army Chemical Warfare Service Siren - Fully Functional EXCLUDE_CHECKOUT_RESTRICTION so they utilize more standard

so they utilize more standard German WWII Dagger construction

Also one of the two screws that holds the eye shade is missing

as a way of economizing and aiding the war effort

The brass trigger guard marked

much more than we usually see

Original U.S. WWI Stewart Model 149A Army Chemical Warfare Service Siren - Fully Functional EXCLUDE_CHECKOUT_RESTRICTION so they utilize more standardOriginal Item: Only One Available: This is a vintage World War One chemical warfare siren which has been repainted and mounted on a beautiful stained wood base. Its a genuine Stewart Model 149A with Serial Number 15492. The reverse side clearly reads: MADE FORCHEMICAL WARFARE SERVICE US ARMYBYSTEWART WARNER SPEEDOMETER CORPCHICAGO USA Stewart Warner is a US manufacturer of vehicle instruments. The company was founded as Stewart & Clark Company in 1905