Here is my latest stove purchase from the Bay at $36.00 USD. A 1946 Primus 51. Purchased one earlier this year but damaged the tank during a fettle gone bad. This stove required the usual maintenance of replacing all the seals. I used a loco7stove NRV removal tool from the very beginning and had no problems with removing the old NRV (it had no lead seal and was slightly stuck). It had an old cork pip which I replaced with a Ross Mellows Viton pip. The tank was gunked up and required several flushes. When I first lit the stove it burned an eerie green color for several minutes then went to blue with yellow flashes and finally settles down to a brilliant blue flame. And here are some flame shots... And two more flame shots with a New Old Stock Hipolito Adjustable Silent Burner.