Up for sale, crystal oscillator capacitor assembly - hard to find - Collins receiver 51S-1 Genuine COLLINS 51S-1 part in 100% working condition Early Collins p/n 547-2679-004 replalced with p/n 547-2681-004 On schematic diagram A8 (page 6-52 "Collins instruction book for 51S-1") What you see is what you get |