I concur that Schmid is a good resource on the text of Revelation. I also found that Hoskier was a great resource when working with this text.
Hoskier, Herman Charles. Concerning the text of the Apocalypse: collations of all existing available Greek documents with the standard text of Stephen’s third edition, together with the testimony of versions, commentaries and fathers; a complete conspectus of all authorities Vol. 1. 2 vols., 1929.
Regarding the Byzantine text tradition, at least some of the variation here can be attributed to the fact that Revelation does not appear at all in the lectionary tradition of the Church. We find much greater consistency in the texts that are regularly used in the liturgical services.
Statistics: Posted by spuluka — February 28th, 2014, 10:51 pm