?Houseflag? ID wanted please ...

[andysk]

Does anybody recognise this symbol, I think it's a houseflag judging by the shape. It's on a pack of playing cards I found in my Father's study whilst clearing it out.
(There is an image in the ID gallery as well ....)

ID'd by Stephen as Saga, for which many thanks

[scorcher]

Andy Having checked Stewarts 1963 /Browns of 1929-1941-1971 I have drawn a blank, I only mention this because others may refer to those volumes.
Could it be that the company begins with 'S' ? Seems likely.