Ed, The Type 21 does have a dykes ring. Looking was no problem, finding was. I have boxes full of old engines in my basement that I've collected over the years. Some day I'll have to dig through them and label what's in each box. All the really collectable stuff is displayed or in shelves or places that they can be easily seen. The stuff in the boxes are pretty much run of the mill engines. I have one 4 gallon fuel box full of Cox 1/2 A stuff and another full of the Cheap McCoys. I was going to sell them on ebay but never really had the time. Takes forever to list them one at a time. Most aren't worth the effort. I Used to give the 1/2A stuff to the local kids but it's all video crap now and no one plays C/L like when we were kids.