michaeldr, on 15 April 2012 - 05:04 PM, said:
From Wiki:
Mexico controlled the territory until 1836 when Texas won its independence, becoming an independent Republic. In 1845 it joined the United States as the 28th state
Victoria's coat of arms (not the Hanovarian) is that used on the flag, which dates it as post 1837
EDIT: also per Wiki - the flag of the USA had 26 stars between the dates July 4, 1837 – July 3, 1845
The United Kingdoms of Sweden & Norway Union Jack is shown and that appears to date from 1844 (per Wiki)
Suggesting the design is from 1844/45
but when the flag is from.........................?
SJ's suggestion is sound I think