Collins 18S-4C Transmitter-Receiver Instruction Book (520-5138-00) by Collins Sale $35.00 | / SKU 1067:R Printed Manual - $35.00 Download - $35.00 Printed Manual Download Size 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart 2nd Edtion, Jan., 1956 1st Revision, Nov., 1960