Frederick served throughout the first world war in the Royal Navy, and was awarded the following medals, which were nicknamed Pip, Squeak and Wilfred after popular cartoon characters -
The British War Medal (Squeak), for those who served overseas from 1914 to 1918.
The 1914-15 Star (Pip), for those who served up to 31 December 1915 but who had not received the 1914 Star.
The Victory Medal (Wilfred), for those who served in an overseas theatre of war.
Frederick's name and service number are inscribed round the rim of the British War Medal and the Victory Medal.
More information can be found here.
Underneath the medals in the first photo is Frederick's hatband from HMS Imogene, on which he served from 27 January 1905 to 26 January 1907.
Frederick Treacher was mentioned in despatches during WWI and his name appears in the Supplement to the London Gazette in 1919, but the reason why he was commended is not available.
This would have entitled him to wear an oak leaf cluster on the Victory Medal. See here.
The first thumbnail is the Royal Navy record of the mention and of the sending of the Victory Medal and the second is the gazette entry.
Key to docs -
A.B. is Able Seaman
O.N. may be Old Navy, ie retired
215148 is his service number
Po. is Portsmouth
Party - sent to recipient.
X in Service Column - No longer in Service.
Frederick served in the Royal Navy from 1901 to 1919.
General information on service records can be found on the National Archives site
Frederick became an able seaman gunner in 1907.