1916年库伦寄张家口红条封1件，贴北京一版帆船2分4分各一枚，信封正面销库伦6月9日英汉腰框戳，封背所贴邮票漏销，邮件到达张家口后用直隶张家口6月19日中文腰框到达戳补销邮票，保存完好，少见ChinaPostal HistoryRepublic of China1916 (9 June) to Changkiakow red band cover, on the reverse bearing 2c. and 4c. but tied by Urga bilingual c.d.s. on address side, so stamps with cancellation by Changkiakow arrival c.d.s. (19.6)
