I needed the (what appears to be) nearly new rocker cover for my post 18000 57. I don't need the walnut shift knob or the 2 "TRIUMPH" letter sets. What I need to know is what models fit my excellent TR3B / TR4 rocker cover without the breather port. From looking at the various catalogs, I can't determine what TR4 models used the cover without the breather. I will soon be putting my own grab bag on E Bay to offset my cost and I would like to have an accurate description of what models use this cover. I refuse to "TR2, TR3, TR3A, TR4, TR4A Valve Cover etc,etc"