What else with two trannies and four EL34?
Old dchool - I own a similar amp Philips ELEL6432 with Ua = 685V.
Pictures: http://www.ebay.de/itm/251953526457?...663&rmvSB=true
or
http://www.ebay.de/itm/Roehrenversta...p2047675.l2557
The similar Siemens 6SELA2805 (former Klangfilm) uses 715 Volt.
Both about 120 Watt - from the Fifties/ last century!
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Peter