Check the listing for details. Drake SPR-4 Assorted Crystals for Sale - NEW. Color: Silver, Condition: New. Listed at 30.00 USD. NEW - Drake SPR-4 Assorted Crystals for Sale - NEW. Drake Part Number Specification 312-0303 13.090 MHz Crystal Freq. / 2.0-2.5 MHZ Operating Freq. 312-0304 13.590 MHz Crystal Freq. / 2.5-3.0 MHz Operating Freq. 312-0310 16.590 MHz Crystal Freq. / 5.5-6.0 MHz Operating Freq. 312-0311 17.090 MHz Crystal Freq. / 6.0-6.5 MHZ Operating Freq. 312-0312 17.590 MHz Crystal Freq. / 6.5-7.0 MHz Operating Freq. 312-0313 18.090 MHz Crystal Freq. / 7.0-7.5 MHz Operating Freq. 312-0315 19.090 MHz Crystal Freq. / 8.0-8.5 MHz Operating Freq. 312-0318 20.590 MHz Crystal Freq. / 9.5-10 MHz Operating Freq. 312-0320 21.590 MHz Crystal Freq. / 10.5-11 MHz Operating Freq. 312-0323 23.090 MHz Crystal Freq. / 12-12.5 MHz Operating Freq. 312-0324 23.590 MHz Crystal Freq. / 12.5-13 MHz Operating Freq. 312-0347 35.090 MHz Crystal Freq. / 24-24.5 MHz Operating Freq. 312-0325 24.090 MHz Crystal Freq. / 13-13.5 MHz Operating Freq. 312-0328 25.590 MHz Crystal Freq. / 14.5-15 MHz Operating Freq. 312-0329 26.090 MHz Crystal Freq. / 15-15.5 MHz Operating Freq. 312-0331 27.090 MHz Crystal Freq. / 16-16.5 MHz Operating Freq. 312-0332 27.590 MHz Crystal Freq. / 16.5-17 MHz Operating Freq. 312-0333 28.090 MHz Crystal Freq. / 17-17.5 MHz Operating Freq. 312-0336 29.590 MHz Crystal Freq. / 18.5-19 MHz Operating Freq. 312-0337 30.090 MHz Crystal Freq. / 19-19.5 MHz Operating Freq. 312-0338 30.590 MHz Crystal Freq. / 19.5-20 MHz Operating Freq. 312-0339 31.090 MHz Crystal Freq. / 20-20.5 MHz Operating Freq. 312-0340 31.590 MHz Crystal Freq. / 20.5-21 MHz Operating Freq. 312-0342 32.590 MHz Crystal Freq. / 21.5-22 MHz Operating Freq. 312-0343 33.090 MHz Crystal Freq. / 22-22.5 MHz Operating Freq. 312-0344 33.590 MHz Crystal Freq. / 22.5-23 MHz Operating Freq. 312-0345 34.090 MHz Crystal Freq. / 23-23.5 MHz Operating Freq. 312-0346 34.590 MHz Crystal Freq. / 23.5-24 MHz Operating Freq. 312-0349 36.090 MHz Crystal Freq. / 25-25.5 MHz Operating Freq. 312-0350 36.590 MHz Crystal Freq. / 25.5-26 MHz Operating Freq. 312-0351 37.090 MHz Crystal Freq. / 26-26.5 MHz Operating Freq. 312-0352 37.590 MHz Crystal Freq. / 26.5-27 MHz Operating Freq. (2 Available)