The German narrow gauge steam locomotives of military field railway (Heeresfeldbahn) class HF 160 D were tender locomotives developed for wartime service during the Second World War. The engines were also classified as Kriegsdampflokomotive 11 (wartime steam locomotive 11) or KDL 11. After the war the locomotives were put to use for civilian purposes.

HF 160 D in Austria

In the Austrian Federal Railway (ÖBB), the locomotives were grouped into Class 699. Class 699.1 was a rebuild of the engines into tank locomotives. Class 699 engines could be encountered on several ÖBB narrow gauge railways: the Bregenzerwald Railway, the Pinzgau Railway, the Waldviertel Narrow Gauge Railway, the Vellach Valley Railway and the Steyr Valley Railway. Six engines had been retired by 1973, number 699.103 belonged to the operating fleet of the Steyrtalbahn until its withdrawal in 1982.

Post 1945