I appreciate this does help us with the question in topic, but I thought I would post it anyway, just for future reference:
The Queen has approved a special hallmark to commemorate her coronation, it was announced yesterday.
The Home Office have informed Mr G.R. Hughes, clerk of the Worshipful Company of Goldsmiths, that the Queens head crowned may be struck at any assay office, from to-day to December 31, 1953, upon any gold or silver ware bearing one of the date letters in current use during some part of that period.
Wares bearing the coronation mark may not be sold in this country before January 1, 1953, although specimens may be distributed for publicity purposes. There will be no objection to sending supplies abroad bearing the coronation mark before that date.
This gives manufacturers several weeks in which to make and dispatch goods bearing the additional mark "For sale abroad" early in coronation year. The actual date on which Assay Offices can accept wares for marking with the special mark will be announced as soon as possible.
A committee representing the Assay Offices and the trade associations have chosen as the most suitable design for the coronation mark a model of the Queen's head by Mr. G. Paulin of Woronzow Road, London. His design has been selected from 10 plaster models considered by the committee and has been approved by the Royal Mint Advisory Committee and the Coronation Medal Panel.
Source: The Glasgow Herald - 1st October 1952
Perhaps the 1935 version may have had a longer striking period due to the fact that shipping goods to Australia, New Zealand, etc, by sea, would have taken months to get there and thus more time was required by the manufacturers to get these pieces ready for sale and available in the shops in Australia and NZ by 1st January 1935. I wonder if Mick's spoon has been around the world?