The S.O.S.Marque

The SOS marque created by Len Vale-Onslow

This was the famous frame that started the SOS marque. A duplex cradle with a pressed steel platform cum engine plated. 8 engine varients could be ordered, 5 Villiers and 3 JAP.
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And this is where it all started in ernest, Hallow. There was no town gas piped here, so brazing would be difficult to impossible. Welding usually had cracking problems, so he approached a steel maker and eventually settled on a chrome molybedenum that was proven to be crack resistant.