the 1915 Penny is with H(London mintmark). both 1941 Pennies are K.G mintmark. The first 1962Y I think is a die variety
The 1915 is indeed a London mint, no "H' under the date.
the 1915 with the "H" under the date was minted in Birmingham ( Heaton mint)
the 1941 pennies could be K dot G but without a magnified image or a Lupe it is impossible to tell.
Finding the dots on 1940 and 1941 pennies requires a good Lupe as the dots are tiny.
The first 1962 coin has PMD
on the rim.
Aim to Enjoy life. You only get one shot at it