The first 6 Philles releases (#100-#105) were originally on an orange and black label with a script Philles logo. Any of these that you find on a yellow/red label are re-issues!!
Philles 105 was also issued on the more-familiar PR-logo label, this design continuing until the end of the series, Philles 136... Curiously, promo copies of #105 appear only on the later PR-logo label.
Up through Philles 115, labels were blue and black (yellow/red labels are re-issues), but thereafter were yellow and red (#115 being both). A few earlier releases, though, were also issued on an orange and black label with the PR-logo design.
Most promo copies were white and black, although Philles 105-109 also were issued as blue/black promos, and there are some white/black label issues that are not designated as being promos...yes, it can get confusing. For more information, see "Collecting Phil Spector...," pages 79-80.
Philles albums came in only the PR-logo design, and appeared at first with blue/black or white/black (promo) labels.
Through PHLP-4006, original stock pressings were blue/black, although several of those early albums also came with a yellow/red label. These are considered "second pressings," and carry somewhat less value. Starting with PHLP-4007, all albums were issued with only yellow/red labels and either red or black lettering.
A final word about the Philles label...During the blue/black label period (#105-114), all releases had a thick line underneath the logo. Later, starting with the yellow/red labels, there appeared either a thick line or a thin line under the logo. The thick line was a west-coast pressing, the thin line was an east-coast pressing. This applied also to promo copies (after #114)...
But what about the blue/black labels? Even though they all had thick lines, they apparently were pressed on both coasts. The difference was possibly in the positioning of the title and artist on the label, along with a slight variation in label color (the question remains "which is which?"). As for the earlier orange/black script labels (#100-105), the difference was probably reflected in the style of print on the label.
