Usually the type 1 just has a ring around the sound hole, the type 2 has some edge binding as well as the sound hole ring , and the type 3 (or deluxe) would have extras like headstock motifs, extended 17 fret fretboards, or fancy fret markers.
Like Martin, (who at one stage Gibson considered buying from and rebranding - but never did), Gibson produced different levels of decoration.
Usually there were 3 levels for Ukuleles but this was all much less rigid that Martins with, in some catalogues, the better one just being called "Deluxe".
In 1944 Gibson was purchased by Chicago Musical Instruments and in 1969 Chicago Musical Instruments, was taken over by E. These are very sought after and command a very high price when they come up for sale.
It was rescued but efforts to expand into a "lifestyle" brand and falling quality led to a second bankruptcy in 2018.
It is the case with these names though that no Ukuleles or Banjoleles are believed to have used them(?
) In the 2010's as part of Gibsons expansion/diversification they again put out some new "budget" brands, Baldwin was used on Chinese made copy guitars aimed for the educational market and Maestro (which they suggest they have been using since 1935 but given their litigious nature and the number of people who have used it since, I don't think they properly registered?
The dating of vintage Gibson banjos has long been a subject of debate and contention. Rather than true serial numbers, most prewar Gibson banjos were marked with factory order numbers which were solely intended for in-house use during production and assembly; attempts to date Gibson banjos based on these numbers represent a significant challenge Since the debut of this site in 1998 I had listed the banjos in numerical order by factory order number or serial number, which I now understand does not reflect the instruments' true chronology.
Martin and Company, Gibson's prewar and wartime numbering system is extremely convoluted and often counterintuitive.
Gibson Ukuleles come in either Soprano or Tenor scale, (I've never seen a Concert Gibson) and are usually mahogany, (there were a very few spruce top examples made).