Here's a factory promotional photo of the Royal Enfield 570cc combination. I believe it dates from 1939. The pressed steel girder forks are quite a distinctive feature, there was a vogue for pressed steel forks through the thirties. Several manufacturers used them on their smaller-engined models but, as far as I know, Enfield were the only ones to use them on their heavyweights.
The 570cc side-valve model was usually known as the Model L, Yesterdays in the Netherlands offered a similar combination a while back and referred to it as a Model H (which I had thought was normally the 500cc sv?) but on the Enfield promotional photo here there is no model designation at all bar 570cc... confusing...
The model H was indeed a 570cc and nearly the same as the model L. The L was the deluxe version with a.o. a chromium petrol tank. It also didn't have the pressed steel girder forks.
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Hi Hilbert, thanks for the clarification. I've got Gordon's book somewhere but I'm redecorating and couldn't find it!
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