Antique Vintage NYPD Police or Military Whistle Stamped Made in Germany

Description

This is an antique or vintage tubular metal whistle that is stamped "Made in Germany." This was among the estate/belongings of a former NYPD policeman who served in the 1940's and whose father served in the NYPD in the 1920's and '30's. Unsure if this was used by either of them during their time with the NYPD or was used during their military service. Whistle is silver colored metal; unsure if nickel or brass composition? Has a darkened patina and general vintage wear (scratches, very minor surface rust, etc). Has no dents or gouges. Stamp is located just below one of the air holes/slits (difficult to photograph but probably most visible in photograph #1 if you use the zoom option.) Whistle measures approximately 2 7/8" from one end to the other (not including small ring attached.) Does whistle/work if you get your lips in the right position; a pretty loud sound, too. An interesting item whether it was, as the family story goes, used during their tenure with the NYPD or during their time of service in the military.
Sale final; no return. Thanks for looking!
Now for the fine print…
I am happy to entertain your best, fair offer!
I use the United States Postal Service (USPS) for all shipping.  Items get shipped either first class or priority mail depending on their weight and size. Please keep in mind that shipping is expensive. I never charge an excessive shipping amount though I may add to help defray the cost of shipping supplies.
I will gladly invoice you and combine shipping for multiple items purchased.
I ship every day; Monday through Friday (except during snow and ice storms) but do not ship on Saturdays.
Thanks for your purchase!