Thank you Gentlemen for your replies

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So generally agreed possibly Indian. Rick your suggestion of a SEA is interesting....for some reason I wondered if this was from Southern India which have weapon features that have influenced / have been influenced by SEA.
Hi Battara,
although the pictures give the impression that the head is 3 sided, it is in fact 4 sided, a diamond shaped cross section. Max width viewed from above is 30mm (1 1/4") ....viewed from side max width is 16mm ( 5/8" )
The red 'band' on the socket is only just noticeable in certain lighting conditions. It seems to 'bleed through' the very dark stablised patina. Not obvious is the very tip is slightly bent and blunted. I do not believe this was 'abuse', but combat damage the overall patina is the same as with the rest of the head and socket.
This damage is consistant with great impact force....perhaps again suggesting a cavalry lance.
One of the 'fullers' out of the 4 is slightly longer. It seems that it has a impressed stamp, which is too worn / corroded to see but, the outline of its 'border' seems almost rectangular 4mm x3mm slightly above that (and centrally) there is a small faded 'something'....under magnification these two combined almost appear to be a crown but like looking at clouds and making out shapes, the more you try to 'see' ....the more the mind 'creates'.
Any ideas as to the red 'band'

thank you
Kind Regards David
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