I can't believe there aren't any prior posts here, so will add mine.  The 36 series added new models to the line after the 30 series, and featured some very nice English Saloons.  This is the Rover Streamlined Saloon, and I was fortunate to be able to get a like new one from H.Hudson Dobson around 1958, when I was a fledgling young collector.  This one is a bit unusual, as it has light blue colored wheels, so a late export version, and I don't think these are too common, as I usually see the ones with black wheels.

       Best regards,  Terry