J66 – KUT Royal Visit 1954 Hydro Electric Dam illustrated cover From Lubanyi Jinja 29 AP 1954

Kenya, Uganda and Tanganyika. Royal Visit 1954, Hydro Electric Dam illustrated cover, unaddressed, presumably planned to be a First Day Cover, but was a day late, if the SG date of 28 April 1954 is correct!

Sent from Lubanyi Jinja, 29 AP 1954. The stamp cancel looks the same but was applied lightly.

What am I bid for a Second Day Cover?