Basic Synchros and Servomechanisms Vol.I by Van Valkenburgh et Al.
1955. First Edition. Unpaginated. No dust jacket. Black cloth boards with gilt lettering. Contains black and white illustrations. Volume I. Clean pages and illustrations with light tanning and mild foxing throughout. More pronounced to free endpapers and pastedowns. Pencil markings to front free endpaper. Binding remains firm. Boards have mild edge-wear with slight rubbing to surfaces and bumping to corners. Gilt lettering is darkened. Moderate sunning to spine and edges with crushing to spine ends. Minor splits to spine ends and corners causing cloth to be frayed. Visible wear marks to boards.