It is a 1975 HJ-HZ wheel. The hard ones are HQ to early HJ. The one I bought was a soft plastic one but it is OK for my Premier, although being a 1974 HJ it has a hard plastic one priginally, it is cracked. Mine is Covert not black. The soft ones are on Ebay regularly relatively cheap, the harder ones are the ones people look for as they crack.