One of four with same-sized small nameplate:
D9003 MELD, D9007 PINZA, D9015 TULYAR, D9020 NIMBUS
What they were up to in 1963:
http://www.napier-chronicles.co.uk/3-63.htm
http://www.napier-chronicles.co.uk/7-63.htm
http://www.napier-chronicles.co.uk/15-63.htm
http://www.napier-chronicles.co.uk/20-63.htm
If a Saturday, it would have been the 6th, 13th, 20th or 27th.
D9007 looks too clean on the 27th:
http://www.napier-chronicles.co.uk/7_27-4-63.htm