MIL-C-10405A, MILITARY SPECIFICATION: CRYSTAL UNITS, QUARTZ, PRESSURE AND SPACER MOUNTED, GENERAL SPECIFICATION FOR (02-APR-1954) [NO S/S DOCUMENT]

MIL-C-10405A, MILITARY SPECIFICATION: CRYSTAL UNITS, QUARTZ, PRESSURE AND SPACER MOUNTED, GENERAL SPECIFICATION FOR (02-APR-1954) [NO S/S DOCUMENT]., This specification covers the following types of crystal units consisting of a quartz element, spacer mounted or pressure mounted between metal electrodes under spring pressure and housed in a sealed holder.