There are no 7 series models in the archives but 3 models exist. The 721 and the 721MR are in the 1993 catalogue and have some similarities to the 821D and DMR which probably replaced them the following year. I am fairly sure that these guitars were Made in Taiwan. Another Made in Taiwan guitar the 721DG appears in catalogues in 1997/98 and appears to have lasted until 1999.
These are essentially the same guitar
Specifications
Body Alder and Sycamore on the 721 Alder on the 721MR
Neck Bolt on Maple
Fretboard 24 frets 648mms scale 350mms radius dot markers normal to 12th fret then under the A string
Rosewood on the 721 Maple on the MR Scalloped above 19th Fret
Headstock Matching Body Yamaha on no string trees reversed on the MR
Tuners Diecast
Pickups HSH exact type not known covers different see catalogue above
Controls 1 volume 1 tone 5 way switch includes coil split appear different types on each model again see catalogue scan above
Nut Locking 43mms
Hardware Black
Bridge TRS Pro
Pickguard None
Colours Aquamarine Burst, Antique Sunburst or Violet Burst
Years available 1993
This is a pretty striking looking guitar with vivid colours and gold hardware, the dot markers are slightly unusual in that as well
as the normal two wide dots on the 12th fret they are also on the last fret.
Specifications
Body Alder
Neck Bolt on Maple
Fretboard Rosewood 24 frets 648mms scale 350mms radius dot markers normal to 12th fret then normal until 2 dots on the last fret
Headstock Matching Body Yamaha on with one bar string tree
Tuners Gold Diecast
Pickups HSH all USA made Alnico V uncovered black
Controls 1 volume 1 tone 5 way switch includes coil split gold knurled knobs
Nut Locking Gold
Hardware Gold
Bridge TRS pro
Pickguard None
Colours Trans Red or Trans Blue
Years available 1997 to 99