Thought I would add to this regarding Sowerby pattern number 1074.
These are the only two items listed as pattern 1074 in Sowerby pattern book V from 1874. A 'Salver' and a butter dish.
This pattern does not appear in the main pattern book, these are in the nine pages of additional patterns dated May 1874. (supplement to the main pattern book)
Additional pattern book for 1874 is on my website but it is difficult to see the factory pattern numbers.
Mike