A Downer, NJ postmark

Most Gateway students might not be interested, but I was interested because a grandfather of mine had family living in Downer, NJ at one time. As far as I can determine the Post Office there closed in 1936. Click on the second link below for a higher resolution image. When this postcard was offered on eBay the seller read the postmark as 1910, but I see Dec 17, 1930 -- and US census records show Oscar Walter Huntsinger with mother, wife Emma, and niece Viola living in Downer in 1930. Viola would not have been born yet in 1910. You can click on the relevant census page link below.

Downer even had a railroad station.

1916 Photo of Downer Railroad Station

Click on link below to see route of railroad.

Time Period/or Year: 1913
Card Type: DIVIDED BACK
Postage/Stamp/if none-Card: 1c Washington Coil #412 - Perf. 8 1/2
Cancellation: BURLINGTON, N.J. WAVY LINE MACHINE CANCEL. Sent to: MISS SADIE M. HOWES, DOWNER, NEW JERSEY. DOWNER, N.J. 4-BAR CANCEL APPLIED UPON ARRIVAL- IT IS A DEAD POST OFFICE(DPO). NEW JERSEY POSTAL HISTORY. U.S. POSTAL HISTORY.
Date: Jan 31, 1913- Arrived in DOWNER Feb 1, 1913
Description/Key Words: Picture side shows: GIRARD COLLEGE.
Publisher/Mfg: SOUVENIR POST CARD CO., NEW YORK.