The Installment Mailing List
Mailing Code is found on the top of the white sticker label attached to the envelope and is mentioned in the Additional Notes Sheet.  
   

Subscriber: Stuart Jacobson

Installment # Mailing Code Mailing Date Notes
I N October 25, 1977 Was the Initial Installment sent after subscription started with K
J N March 08, 1977  
K N January 18, 1977  
L N Unknown Mailing date is hard to read
M N July 05, 1977  
N N No Date  
V 18 February 08, 1988 Suspect PO stamp error and should be 1979
W 18 April 05, 1988 Suspect PO stamp error and should be 1979
  U October 12, 1988 Unknown envelope, Suspect PO stamp error and should be 1979
19 G24 No Date  
21 G24 No Date 'G24' is dot matrixed
22 G24 No Date  
23     No envelope since previous one is actually Installment N's
 

Subscriber: Tom Goyda

Installment # Mailing Code Mailing Date Notes
W 18 April 05, 1988 Suspect PO stamp error and should be 1979
20/21 G24 No Date Has all of CSWE minus shop coversheet and order envelope
      'G24' is dot matrixed and matches SJ's 21 envelope
22/23 G24 No Date 'G24' is different font then 20/21 envelope, but matches SJ's 22
 

Subscriber: Unknown

Installment # Mailing Code Mailing Date Notes
# No Code Month #, 19##