Queen's Royal Surrey Regiment (TA) Forage Cap.
 

An Other Ranks cap of the 3rd and 4th Territorial Army Battalions of The Queen's Royal Surrey Regiment.

The Queen's Royal Regiment (West Surrey) and The East Surrey Regiment amalgated to form The Queen's Royal Surrey Regiment in 1959.

The regular 1st Battalion wore the cap badge and buttons of The Home Counties Brigade, the Territorial Army battalions continued to be named as battalions of The Queen's Royal Regiment (West Surrey) and The East Surrey Regiment, wearing the insignia of those regiments until they were reformed as the 3rd and 4th Battalions of the new regiment in 1961.

The Queen's Royal Surrey Regiment was amalgamated into The Queen's Regiment in 1966, the 3rd and 4th Battalions being disbanded in 1967.

(If I've got any of the above detail wrong please correct me).

The cap bears anodised aluminium badge and buttons of the Queen's Royal Surrey Regiment (the buttons are similar but different to those of the post 1966 Queens Regiment), the peak is of leather but with plastic trim, the chinstrap is of plastic with blackened metal fittings (I don't know if they're brass or steel) I don't know if this would be correct for a cap of the period.
The manufacturer is J Compton Sons and Webb, the date of manufacture stamped on the leather sweatband is 1964.
I think the cap is fitted with a brass spring clip retainer for the badge slider as I couldn't easily remove the badge to check it for manufacturer's markings, I don't want to risk damaging it.

For (the confirmation of what you say of) the lineage:
West Surrey
East Surrey

Thank you for that

Nice piece of kit that. Thank you for sharing

So the interesting bit is the button. The Queens button is more common as the lamb is on a circle in the star. Queen's Surrey's button like this is less common. Obviously the hat dates it well. An attractive badge, particularly the officers version.

I'm not at all sure about the chinstrap though, would a 1964 - 1967 worn cap have plastic rather than leather.
I'd like to check for a manufacturer's mark on the badge slider but doubt I'd get the badge off the cap without inflicting damage.
Were the brass clips for slidered badges introduced on the assumption that as an anodised aluminium badge didn't need to be polished it didn't need to be removed from the cap?
I have an officer's badge but I think that's had the lugs removed.

Nice !

Hi Leigh, just to add to the chin strap information, I still have my Dads cap (same type as you show) dated 1963 made by J.Collet Ltd London and it has a plastic strap, my Dad at the time was a CSM HQ Company 5th Bn Middlesex Regt (DCO) TA & fully badge to the Middlesex Cap and chin strap badges , just a bit of information might help:)

Gerard

Thank you for that info.