Bayonet British MK4 with leather tab help please

[Rescue190]

I picked up the less than good condition bayonet due to it have a unique leather tab that I have not seen before. The scabbard markings are good though. Any thoughts or opinions are appreciated. I took it off for the main pics and then put it back on.
John

[Kilian]

That is called the “Tab, Securing, Bayonet No4 MkI. Scroll down to the end of the page Britain - The No. 4 Spike Bayonet

It was introduced early in the war.

The bayonet you show is a later war No4 Mk II*. I can’t make out the maker of the bayonet, but it could be Prince-Smith & Stells.

[Rescue190]

Thank you Kilian. I never knew it existed. I am surprised they needed a retainer. They are a bugger to remove to begin with.
John