valve chest cover I.D

[womble 36]

Good morning, recently bought this alloy chest cover and just wondering who could have made it. It has a space for (presumably) a makers plate but has no rivet holes. Does anyone have any idea or recognise it please.
Many thanks for any (polite) suggestions, Charlie.

[Lowespeed]

Looks like a "Supaloy" valve chest cover to me. I cast one and machined the letters off to put my own lable on it with plastic casting letters; then cast it in Aluminium. Maybe someone did the same to have a plain cover

[Steve kay]

Oh dear, no name and no evident provenance. Sadly it can hardly be worth ten bob. However, if you’d like me to put a pound note into an envelope and post it off to you.......

["Slack Alice" Simon]

Am I right in thinking it is drilled to fit an early block?   The later ones have holes that are in the middle?

[AustinWood]

I think those holes are in the middle. There is space left to drill the holes for early block.

["Slack Alice" Simon]

Ah, yes.   Now I see there are different numbers of lines top and bottom.

[Colin Wilks]

Assuming you intend using it, it is worth checking for straightness before fitting. Mine was about 4mm bowed, meaning the outer ends didn't put much pressure on the gasket. I flattened it by taping some emery to an old granite worktop, reckoning it was better to sacrifice a little bit of meat for the sake of a perfect fit from the off.

[John Mason]

Steve, Showing your age now talking about 10 Bob and 1 pound notes. They were the days when you could have a night at the cinema followed by a fish and chip supper and still had change from a pound.

John Mason.

[womble 36]

Just a note to say many thanks for the info to those who replied.
Steve - checked post box. still no nicker in it.
Colin - thanks for tip, will check for flatness and deck it if needed.
John - no cinema but remember going for lunch in my 2nd year of Litho apprenticeship (1971) Pint of mild and bitter 2/5d and next door to chippy for cod and chips 2/6d. Anyone got a time machine please? Regards Charlie.