The insulator in the middle, I am sure is a 154, because I have seen a ton of them. Are the two on the outside 153 or just another variant of the 154? If all these are 154s, could someone post a comparison photo of 154 and 153 Whitall Tatum. Thanks for the help.

Answer is: All 154s

Thanks to Chris Childress for posting this comparison pic :[id=115805335]