Comment by han enderman:
Bell P-234 - Another difference between the blank and Pan label types is the cat.nr. On the earlier type the P prefix is followed by a dash (P-234), which is omitted on the Pan labels (P234). Also the bottom legend and the fonts are different, and the description at 3 changes from upper case to lower case. Conclusion: everything is different.
Comment by han enderman:
Bell P-234 - added label images of 1st edition A-side and 2nd edition both sides (from
archive, where the music is available). The 1st ed. is the last release in this series with the Bell plain label; Bell P-235 has Pan pictured at 12, as has the 2nd ed. here.