Butt Markings

Can anyone identify the 'JC' on my L42 butt ?
I assume its not 'Jesus Christ' or 'Jungle Carbine'

Thanks in advance.

https://www.milsurps.com/images/impo...DSCF0048-1.jpg

https://www.milsurps.com/images/impo...DSCF0049-1.jpg

John Curtis & Son Ltd, Leeds. They made a lot of wartime No4 woodwork. "JC" can appear with or instead of their factory code of "N22".