I could not find the previous discussion on the 79 shuttle type so I thought it best to start again. I managed to find another recently and this one is much better grade that the previous one . I know Jerry has another that he purchased at auction 152 item # 2434 and I listed another recently on a thread but on a search I could not find it again. It is clear on this specimen that the large lump of raised metal above the lighthouse is made up of four distinct units the base which takes on the appearance of the lighthouse used in later dates H rev I think it is (not that I am saying this is why it is I just mention it as the shape is similar) a blunt ended cone. The second layer seems to be similar in shape and form but offset to the left . A higher lump on the left base and lastly the highest section mid right. Interestingly it appears that the area below seems to be bordered by a fine raised line leading down to the top of the extant lighthouse. It may be that there is a depression.
well it is an interesting variety (i think so in any case) the other one I have is the exact same outline but is less detailed (worn)