Need to know a make, model, and description of the stamps. The British used more than one service rifle during that time.
100-1000
Tens of thousands of USD
125 USD
125 USD
$30
No such weapon made by Browning. However, they did make the 1918 in 30/06. Value in the tens of thousands of dollars if legally registered
Depends on condition and originality (modifications). An original military rifle, such as the SMLE, in good condition, may be $150-$200. In very good condition, $300- $375.
James Branch died in 1918.
Around $300-$400 if in Very good condition in original 6,5 X 53 Dutch caliber with all numbers matching. If it's been converted to British .303 calber (Dutch East Indies) the price goes down.
Oblin The Switzerland of British Columbia - 1918 was released on: USA: 20 May 1918
Trinidad British West Indies - 1918 was released on: USA: 21 April 1918