Unknown Affiche Ancienne 英国铁路公司制作的题为 "控制 "的原版老式教育海报，上面有乘客查看列车时刻表的插图、在交通控制中心工作的工作人员、一名男子查看繁忙路口信号图的插图、一列蒸汽火车在车站等待警卫发出 "右转 "信号的插图、信号类型图、信号分块系统，以及显示客运和货运列车自动制动系统的较小插图。横向。状况良好，有折痕、小裂口和轻微污渍。发行国家：设计者：英国尺寸（厘米）：51x7651x76，印刷年份：1950s.

Composed of several subsidiaries, the Drouot Group is a major player in the art market. Hôtel Drouot, located in the heart of Paris, has been the world's largest public auction center since 1852. 15 salerooms are available to more than 70 auction houses. The emulation generated by an annual offer of 230,000 artworks from 21 major specialities - from Antiquity to street art - attracts some 3,000 visitors every day. The Group's digital platform, Drouot.com, offers digital sales - Live auctions (live broadcasting and participation in auctions), Online-only auctions (dematerialised auctions) and Buy Now sales (sales of lots at fixed prices). Nearly 2 million items are offered annually by 600 auction houses. Auction news is reported every week in La Gazette Drouot, the leading weekly magazine for the art market and culture published by Auctionspress.