We previously published a parts book for the 1927 3.46hp Model 350 sv and 351 ohv models but decided to also include this catalogue as there are significant differences even though they are only 2 years apart. 1925 was the first year of the 3 speed Sturmey Archer gearbox, and internal expanding brakes, but Royal Enfield were still advertising rim brakes. And in 1925 the single bicycle tube type handle bar mount was still being used, whereas by 1926 a cast type handle bar was in production. No doubt there are other differences as well.
Click on the front cover below to see the complete 29 page catalogue.
It is a 4.3M PDF.