To add only slightly to turnerriver's post about Myres Made holsters; Dale is actually Samuel Dale Myres Jr and was also known as Ted. Mighty confusing when trying to put what we know of Sam against Sandra Myres' bio of him (she was married to a distant relative of Sam's) because we know there is a Dale, but in her book she calls him Ted; and Sam's nephew Dace, who was the big wheel in that time, appears often there but is not a mispelling of the name Dale. Ack.
Jr. (I'll call him here) wrote a book of his own, titled The Education of a West Texan and it was published just two years before his death in 1987. Just after his father's death in '53, in 1955 he returned to the fold from his academic career (a doctorate and a professor) to find that Dace didn't want him in the small operation; too many cooks perhaps. So as Dale Myres he formed Talabarteria Fronteriza in 1956 during the height of the fast draw craze; and sold the operation explicitly because of the end of that craze in 1961.
The parallel dating with Arvo is quite precise: Arvo started up in '56 and by '61 was no longer the top maker at the Fast Draw championships in Vegas. In '62 he was both at the World's Fair in Seattle -- and about to go out of business forever by losing a lawsuit with Andy Anderson that pushed him out of California.
I have a copy of Sam/Ted/Dale/Doc/Jr's book, as does turnerriver, and I'm intrigued that Jr. has omitted his father's second wife, his stepmother; the notorious 'Miss Forkner' who it appears was Sam's leather buyer when he took up with her circa 1919 (he's divorced from Jr's mother in the 1920 census). In 1919 she was 24 and we can fill in the blanks about there. She lived only until 1928 though while first wife Druza/Drusa lived until 1958.
Speaking of books I've been handed some worthwhile information about the life and times of Ed McGivern and his book. Will post about that sometime; and about John Henry FitzGerald (correct spelling) of Colt's and the Fitz Special's fame.