Trade shock mount for shock mount- Have- Nicely marked (Released Febuary 1937) GF-4 shock mount. Clean, 99% complete paint. Need- GF-10 shock mount (green label). Needs paint OK, as long as the nomenclature plate is unmarred. Also need GF-10 transmitter tuning units. Have many GF/RU parts, some in NOS condition to trade for them. Thanks, Dave S.