Trolleybus 31 of the Mürztaler Verkehrs-Gesellschaft (based in Kapfenberg, Austria), turning at Redfeld terminus on 5 September 1983 – on a test or driver-training trip one week before the Redfeld line was reconverted to trolleybus service, after 20 years of being a motorbus line. (Trolleybuses had previously served the line until 1963.)  Number 31 was a 1963 Büssing/Emmelmann trolleybus that MVG had acquired secondhand in 1969 from Giessen, where it had been No. 24 in that city's trolleybus fleet.
<a href="//commons.wikimedia.org/wiki/User:Steve_Morgan" title="User:Steve Morgan">Steve Morgan</a>
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<span class="int-own-work" lang="en">Own work</span>