A used Cybershaft 10MHz clock with ultra-high precision OCXO Ultimate (OP 17 model) for sale. The Cybershaft is a premium branch of making high-quality 10 MHz master clocks for audio use and has many positive reviews & feedbacks from Hifi users all over the world. The OP 17 model indicates its phase noise is -117 dBc/Hz or less at offset 1 Hz as the grade of clock for Cybershaft. It improves the sound quality significant for the Hifi system which accepts external 10MHz master clock such as dCS and Esoteric. Please see the detailed description from its official website: https://www.cybershaft.jp/a-products/ultimate1.html

This unit was made in 2018 and I bought it unit from the original owner in China in 2019 (so its input A/C voltage is 117~230V). The cosmetic condition is excellent and in great working condition. I am using it with a step-up (110-to-220V) power transformer in the U.S. I consulted with Cybershaft and they said the power transformer can be replaced to the 110V version per user's request but the user will cover the in-bound and out-bound shipping fee (e.g., between the U.S. and Japan).

I have all the original paper work (e.g., the testing report, user manual) and original box for this item. The original price of this model is 318,600 yen (about $2,900) excluding the shipping cost. Actually this model is not continued for sale in Cybershaft official website (but the service of model is still available) and upgraded to a new model named the MA series (see https://www.cybershaft.jp/a-products/ocxoma1.html for details). The main difference is that it is used with an external DC power instead of the build-in AC-to-DC power transformer in the clock. The price for the MA-OP17 one is 247,500 yen and the external DC power is 39,600 yen. So the total price is 287,100 (about $2,650). However, all the MA models are actually sold out now (see https://store.shopping.yahoo.co.jp/cybershaft/ocxo-ma-17.html) and the time of restock is unknown.

I put this unit for sale now and will consider to append the step-up transformer without extra cost to the buyer per request. The asking price is $1,800. The buyer will pay the shipping cost and transaction fee if any. Local pick up in Bay Area is welcome.