Postcard, b/w, semi gloss. Obv: View of interior of spiral turbine casings, and closed guide vanes to right. Note man posing for camera, light coming from right (photo probably taken before completion). Rev: Printed black. Centre, a line, vertical, dividing the card, interrupted in the centre by 1182. Upper end of line nearer to edge of card than lower end. Top, right, slightly left, Post=Card, with below, centre, two dotted lines, then a space, then two more dotted lines, shorter than the first two. Top right, dotted rectangular stamp frame, with within it, Printed / in / Germany / (space) / W 89 29. Left, parallel to left edge of card, T.C. Caroll (sic - misprint - should read Carroll) & Sons Stationers, Limerick. Bottom, left, title, Shannon Power Scheme / Siemens, Schuckert A.-G. / Siemens Bauunion G.m.b.H. / Berlin / Interior of Spiral Casing and closed guide vanes.