Help ID an SMLE butt disc

[Hamp89]

Hello

I own a deactivated Indian SMLE dated 1942 and have been trying without success to identify several markings on the butt. The butt disc reads WTD 88 as can be seen in the picture below.




Another marking on the wood itself reads KA 5 43 as seen (just about) in the picture below.




Any ideas on what these mean? Which unit it could have been issued to?

Hamp