Just picked this one up - fantastic 1950s alarm watch from the Langendorf Watch Co (Acquired and extinguished by Omega/Tissot in the 70s).
Everything is controlled by a single crown, including setting and winding the alarm. Many additional great features - gold hands and applied numerals, blue tipped alarm hand, 15 minute demarcation track for the alarm, alarm on/off indicator at 12... I love my memovoxes (memovoxi ?!) but in terms of value, this thing gives them a run for the money!