SMD Crystal Oscillator, SMD Crystal Oscillators, RTC Crystal Oscillator Manufacturer of TXC has KHZ crystals oscillator in SMD seam sealed ceramic package. AT fundamental solution provides good frequency stability.
http://www.taiwantrade.com.tw/EP/txc/products-detail/en_US/808488/SMD_RTC_Crystal_Oscillators_-_ACZ_Series/
http://www.taiwantrade.com.tw/EP/txc/products-detail/en_US/808488/SMD_RTC_Crystal_Oscillators_-_ACZ_Series/