Blue Note vinyl: flat, beaded, serrated edges

Last Updated: December 25, 2017

1. Flat Edge

The very earliest 12″ microgroove Blue Note  LPs (1956/7) were pressed without the slightly raised profile to the edge of the central label area – called a “groove guard” – which is found on all later pressings. The first pressings of BNLP 1500-1557 all have a flat profile, and none after.

The flat edge also refers to the outer rim of the vinyl, where the straight cut edge is later followed by a rounded  “beaded rim” This is a by-product of the waste extrusion trimming process immediately after pressing the vinylite biscuit.

2. Serrated Edge

Another “anomaly” found on a small number of Blue Note re-issues in the Liberty Years (1966-70) is the serrated edge, which was characteristic “trademark” of one pressing plant, believed to be Keel Mfg. Corp. of Hauppage, Long Island, N.Y. (long since defunct)


The significance of serrated edge is close to zero, however it is not “negative”. This pressing was pressed from an original Van Gelder Stereo master. I have five Division of Liberty pressings with serrated edge out of  about fifty Liberty reissues. Uncommon, but not rare.

Liberty Serrated Edge:

1581 (re) Rollins/ Night at the Village Vanguard
84130 (re)  John Patton/ Along Came John
84285 Three Sounds/ Coldwater Flats
84196 Hubbard/ Blue Spirits
84273 Mobley/High Voltage


Vinyl production process (wiki)



11 thoughts on “Blue Note vinyl: flat, beaded, serrated edges

  1. I was just playing my lou Donaldson blue note 4271 ‘Mr shing a Ling’ and noticed it has a serrated edge. I believe this is my only blue note that has this feature.

      • I have a strong speculation that the serrated edge is an indication it was pressed by ABC as I recently came across a large stash of early ’60s ABC records and every one had the serrated edge.

        In my limited experience with duplicate pressings where one had a serrated edge and one didn’t (two Blue Notes and one Impulse with identical deadwax etchings), the one with serrated edge had a clearer top end and was on quieter vinyl. Obviously this has nothing to do with the edge, more likely than not they were just pressed with a fresher stamper but I did find the consistency interesting.

    • this Baronet Parker record was the first LP I owned. My parents gave it to me on my 14th birthday in 1962. (I still own it) I played it a zillion times, and with 4 boys from the neighbourhood we changed our dixieland band into a modern jazz band. This was the only record we had. We played nearly all the quintet song of this Baronet. Life was good, and as far as i knew, all records had serrated eges. Although, checking it right now, I see that about a quarter of the record is not so very much serrated but more raised edge.

      • That is an awesome story, sorry I just saw it and am replying right now. My introduction to jazz also came through Charlie Parker – I’m a bit younger so it was “Diz n Bird” on a casette tape. Still remembered listening to that one over and over again though. Eventually scored it after getting a record player two years ago on the Royal Roost label. Such a great recording, even if the sound quality has much to be desired.

  2. Thank you for the info on the serrated edge liberty pressings. I have 10 Liberty pressings and 3 of them have the serrated edge. Somethin’ Else, Miles Davis Vol 2 and Mosaic By Art Blakey. Ive noticed that the vinyl on these seem to be of better quality as well, maybe slightly heavier. I actually think it gives the records a nice touch. I just wish i could find more of them.

    • Just received a Div of Liberty Hank Mobley “Hi Voltage” that has a serrated edge to it. Definitely does seem to be a bit heavier than other Div of Liberty pressings I have. Looking forward to comparing sound quality on it, would be nice to someday nail down which plant pressed these, not that it would help w/ finding these LPs online since I don’t think I’ve ever one seen an Ebay seller describe the serrated edge in their listing…..

  3. I think there is some confusion regarding the term “flat edge”, it does not refer to the shape of the actual edge of the record but the lead-in area being perfectly flat, lacking any raised groove-guard. Here is a link to Classic Records webpage which has some excellent photos demonstrating the difference:

    • Well I’ve learned something today. I have read people referring to “Gruve-guard” and “raised lip” and “raised edge”, so I assumed “flat edge” was something else. Haven’t seen “flat edge” photographed before. Power of the picture to communicate much more than the word.

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