Please keep in mind Mike's 110 was made in 1959, which means his bolt is unique to pre-66 110s. It does not have an ejector assembly, in fact, the bolt has none at all, and the extractor is nothing like post '66 110s.

Edit to add: I knew I had posted bolt pics previously, a little searching and found the topic, you can see pictures of these bolts, including bolt head, in this topic