Fair to good condition as shown - these are unsent examples, one is addressed in pen and the other is not.  Bottom example has some pencil notes as shown.  Some soiling/discoloration from age as well as some adhesive marks on reverse (top example looks like it may have been mounted at some point).

This is part of a small collection from a relative who worked as a civilian engineer in the Portsmouth shipyard for many years; there are other ship & submarine first day covers available in separate postings (some with invitations to launch events) - please let me know if you are interested in a combined purchase.