Synonym or breeding number (also FR 487-88) for the Monarch grape variety; see there.
There are two grape varieties with this name:
The red grape variety (also FR 487-88 R) is a new breeding between (Merzling x (Zarya Severa x Muskat-Ottonel)) x Dornfelder. In some sources this is stated in the form Solaris x Dornfelder; because the Solaris variety later emerged from the Muttersortemother...
Serious sources on the internet are rare - and Wine lexicon from wein.plus is one such source. When researching for my articles, I regularly consult the wein.plus encyclopaedia. There I get reliable and detailed information.
Thomas Götz
Weinberater, Weinblogger und Journalist; Schwendi