. Electric railway journal . Over 10,000 PVValves in use The Best Proof of the high efficiency of PV Brake Valves can be found in their general adoption by many of the largest electrictraction companies. They are so far superior to all other types of valvesthat during the short time they have been on the market we havealready filled orders for Over Ten Thousand Have you sent in your order yet? If your cars are not yet equippedwith these valves, better write now for Bulletin E388—it tells allabout them; OR send us a trial order for one and test it outunder your own particular service conditions


. Electric railway journal . Over 10,000 PVValves in use The Best Proof of the high efficiency of PV Brake Valves can be found in their general adoption by many of the largest electrictraction companies. They are so far superior to all other types of valvesthat during the short time they have been on the market we havealready filled orders for Over Ten Thousand Have you sent in your order yet? If your cars are not yet equippedwith these valves, better write now for Bulletin E388—it tells allabout them; OR send us a trial order for one and test it outunder your own particular service conditions. National Brake & Electric Co. Works at Milwaukee, Wis. 6 SALES OFFICES New York 165 Broadway Chicago 827 Railway Exchange St. Louis 318 Security Building Pittsburgh Ninth and Penn Avenue London, England 14 Great Smith Street


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