österreichische Staatsbahnen, kkStB) designed to work on the Erzberg Railway (Erzbergbahn) in Styria.

[1] As early as 1911, the Erzbergbahn was no longer able to cope with operation with the 18 existing steam locomotives of the 69 series.

The designation 169 was already assigned to locomotives of the kkStB on the Tannwald-Grünthal line (today in the Czech Republic).

Until the development of the 297 series in 1941, they were the most powerful cog railway locomotives in the world.

It has not been put back into operation since its boiler ticket expired in 2002 As of 2020[update].