Glenn:
If I could amend your post and add a detail or two....
When they first came to Nashville (their father arranged a meeting with his old friend, Chet Atkins) Don was playing a Gibson Southern Jumbo (SJ). In fact, as I said earlier, this was used on their first two or three hit records, even though they had acquired a pair of standard sunburst J-200s for stage appearances. These J-200s can be seen on the cover of their first LP ('They're Off And Rolling'); the sleeve-picture shows them astride Harley-Davidsons with the guitars slung on their backs.
Next they got a pair of black J-200s with black laminate 'guards (see my pic in an earlier post). We're not sure of the disposal of these guitars, but Albert has sent me a picture of one of them now owned by someone else (he saw it at James Burton's Guitar Fest recently; pic below).
Next they had their most famous J-200s, the black ones with big white double-guards. It is one of these that Don gave to Albert in the late-'70s. Albert thinks that Phil still has his one.
Then - a fourth pair of J-200s; these were a grayish colour with big black 'guards (see the LP 'Instant Party' - they also used them on Ed Sullivan's TV Show when they appeared in their Marine uniforms). Albert informs me, though, that these had a paint aberration and the 'gray' became a sort of unattractive green colour, so they offloaded them.
At some point, Don gave his father, Ike Everly, his original sunburst J-200; this reverted to Don when their father passed away in the '70s.
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The Gibson 'Everly Brothers' model:
The first two (made in 1962) were in a cherry sunburst - very different from a J-200 in appearance - and these, naturally, went to the Brothers. The first sighting of them was on the sleeve of their 1962 LP, '...Great Country Hits'.
In 1963 general production of the Everly Brothers model commenced, most being in black with faux-tortoiseshell 'guards. Some had blond tops and , later in the run ('63 - '72) they were fitted with smaller 'guards. A total of 488 were made. Don also had an 'Everly' with non-standard 'guards - a pair of 'teardrop' shaped ones, similar to those fitted on Martins.
Sad to relate, when Don moved to Nashville from CA he lost a number of instruments that were stolen from a storage facility. Among the missing guitars were his original sunburst J-200, as well as a couple of his 'Everly' models. Happily, he still has the Gibson 'SJ' that is heard on 'Bye Bye, Love'.
As I stated above, they've used Robert Steineggar's 'Ike Everly Model' guitars on shows since their reunion at London's Albert Hall in late-1983.
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So: They had at least four pairs of matching J-200s, then went on to use various 'Everly Bros' guitars until their 'split' in 1973. As Glenn rightly says, these are smaller than the 200s. At a glance, see the EB has 'star' motifs in place of the J-200's 'crowns' and 'squashed frog' on the fingerboard and headstock respectively.
I'm very much obliged to Albert for filling in a number of 'blanks' for me. I'm happy to relate that he's as bad as I am for wanting to ferret out all this trivia!