LJC Illustrated Reference Guide to the label of 1st pressings:
Mono A-1 through to A-9165
Last Updated: November 12, 2018
Synopsis by DottorJazz
A-1 to A-33: a product of AM PAR record comp
A-34 to A-100: a product of ABC Paramount records INC
A-1 to A-80 (except A-79-A), A-99, A-100 : NO suffix -A/-B
A-79-A, from A-81-A on: suffix -A/-B
(A-9101?): third in a series without suffix-A/-B, may exist without suffix -A/-B
A-9101-? to A-9132-A, A-9135-A, A-9136-A, A-9143-A: a product of ABC Paramount records INC
(except A-9120-A: a product of ABC records INC New York, N.Y. 10019-made in USA)
WHITE PROMO, orange label not yet found, if exists: no credits, no address
A-9126-A, A-9133-A, A-9137-A, A-9140-A, A-9144-A, A-9147-A,
A-9149-A, A-9150-A, A-9151-A, A-9152-A, A-9153-A, A-9154-A,
A-9155-A, A-9157-A, A-9158-A, A-9159-A, A-9163-A
A-9138-A, A-9142-A: a product of ABC records INC New York, N.Y. 10019-made in USA)
A-9139-A, A-9165-A: later ABC white promo
A-9165-A: LAST IMPULSE MONO? only in later white promo
A-9141-A, A-9145-A, A-9146-A, A-9148-A, A-9156-A, A-9160-A,
A-9164-A: ??, not found
A-9156, A-9161, A-9162, A-9166 and higher STEREO ONLY
LJC Illustrated Reference Guide: 1st pressing original label Mono
Pictured, the label of original first pressing of every title released in mono by Impulse A-1 through to A-9165.
Click to view full screen at 2000 pixel-wide
A-1 to A-25 : Orange/black ring label, Am Par Record Corp
A-26 to A-50 Transition from Am Par to ABC-Paramount Records Inc.
(Updated November 12, 2018 with A-29 – found as Am Par)
A-51 to A-75 (updated August 12, 2018)
A-76 to A-100 (Updated August 12, 2018)
At A-79, introduction of A/B suffix to catalogue number (except A-80): A-##-A / A-##-B format. Any title A-1 to A-78 with A/B suffix (e.g. A-33-A) is a later pressing, not original.
A9010 to A-9125
A-9126 to A-9150 Transition from ABC Paramount to ABC Records Inc. Mono increasingly found only on white label destined for radio play/ promo; commercial releases are stereo
Thereafter, AS-9166 and higher, the Impulse imprint became Stereo-only.
A few titles in the run up to A-9165 are not found in mono. The final run of mono releases may only have been white-label promotional copies destined for radio play.
This Guide relates to US pressing. European pressings, which were mastered locally from copy tape ( see ♪), may have continued with mono format for some time, insufficient information has been collected at this time.
♪ Note – exceptionally, a European edition of an Impulse title has been seen bearing Van Gelder stamp, indicating use of original US metalware . The title in question, Oliver Nelson Blues and The Abstract Truth, may be unique of possible one of a number of Italian Impulse pressed in this way. It was common practice between Prestige and UK Esquire in the late ’50s/ early ’60s so there is a precedent, but it is otherwise a rare form of overseas distribution.
Update: September 10, 2017
Eagle-eyed reader Rob G spotted this late series mono title, A-9152, on orange/black label, among a hoard of white promo label Impulse LPs, no doubt collection of a disk jockey or radio station.
Photo credit: Rob G
Possbly a rare example of a promo issued on a regular label, but not a commercial mono release.
UPDATES August 12, 2018 – addition of missing and improved quality label-shots courtesy of record collector and Impulse completist Maurizio, my thanks.