Monograms identification

[Dado]

HI. Can anyone identify the SAM and CEW monograms? Thanks for your help.

 

[Snufkin]

Some context would help as to the store or packaging so marked. In the absence of any context, a possibility for SAM is die SA Munt (South Africa Mint), Pretoria, and CEW either Central Engineering Works Ltd, Johannesburg or City Engineering Works (Pty) Ltd, Pretoria.