Middlesbrough, Albert Park - Oilette 7403

TuckDB link ALBERT PARK - TuckDB Postcards
I have found an earlier First Use date for this card. The problem is the year is unclear on the postmark.
The card is clearly a pre-1936 printing with a reference to a Royal Warrant from George V and Queen Mary. Then the stamp puts a date on the cards use between 1910 to 1918 as it is a green halfpenny George V (postal rate between 1910 and 1918)

The postmark is 1st April 191?
Good luck with this one!!

Nice one, I’ve uploaded your new back and updated the first use: