Dear Mr. Ian Hunter wow ........ !!!!!! I found a long time, wanted to see a stove. This version is considered as reviews about the possibly Juwel 3p. Because it resembles Juwel-5b / Juwel-6b and the pump. However, if the same will be referred to 3b stove legs. Thank you for showing a very old stove First, you need to think two things to restore. 1 Specification of the cap 2 fuel cap air valve Then you see the data record. 1 of cap Dimensions: Height 26mm / Top width: 22 mm / bottom width: 34mm Hole size: 1.2mm / The spacing between the hole and the hole: 2.1mm The thickness of the cap :: 1mm Number of Holes: 42ea Hall singular: 5 2 air valve: GB Juwel is consistent with other products (photos)
This cap is a Juwel-6b technical museum in Sweden. This seems to be best way that can help you in a foreign country. I'm sorry I can not give more help relax
Mr. Ian Hunter I do not know whether this answers your question. As shown in illustrations a long slender than juwel-6 in the early days of the pump juwel-3. In comparison photos, look at the leather backing Is larger juwel - 6. Attached to-check valve juwel-6 stove There are four types in my experience. check valve juwel-6 stove