Precision Model 220 Marker Adder Manual $8.99 Category: Precision Apparatus Company Description Description For sale is reprint of Precision Model 220 Marker Adder Manual. Manual is 10 pages long, Dated 1956. Sections include: Introduction, Circuit Description, Operation, Service Notes, Etc. Manual includes schematic. Related products Precision Tube Tester 612 and 614 Manual with Tube Test Data $14.99 Read more Precision Tube Test Data for 910 912 914 915 920 922 954 Tube Testers $9.99 Read more 1967 Precision Supplementary Tube Test Data for 640 and 660 Tube Testers $9.99 Read more 1953 Precision Apparatus E-200 Servicing by Signal Substitution Manual $10.99 Read more