Hi, I thought it was time to have some more stove photos! Yesterday I worked on this Primus No.4 stove, dating from 1939 ( code AD). The Primus 4 is not a common stove and I am not sure if it was produced after WW2. It is a 1.5 pint, brass tank, paraffin stove with fixed legs. It was fitted with a small silent burner. Its sister stove is the Primus No. 0, which used the same roarer burner as the Primus 210. When I acquired this particular stove I soon got it working well. It was one of those rare paraffin stoves which would self-pressurise during the priming stage if the air-valve was closed.......However the burner was a roarer and therefore wrong. At the recent Newark CCS meet I purchased a partial Primus 4 silent burner. I had some "new" silent caps in my spares box, and knew I could now complete this stove. here are some photos of the stove operating. It has a brass outer silent cap, and I am using heat -proof washers made from Novus 30 material. The silent burner on a No. 4 stove has a particulrly deep "skirt", collecting heat for the vapourisation and providing a shroud for the actual silent burner cap. This photo shows the five rows of holes in the small No.4 silent burner cap. This shot emphasises the depth of the skirt. It is much deeper in proportion than that on a "modern" Primus No. 5 silent burner. The stove works well and is both powerful and relatively quiet. Just the thing for an early-morning brew-up without disturbing Ian in the neighbouring tent! I still need to tidy up the soldering on one of the legs but the stove is going great and at 68 years ol age is a credit to its Manufacturer. Take a bow Primus ! Best Regards, Kerophile.