MULTIFORT POWERWINDPower Reserve Up To 80 Hours Nivachron Balance Spring Vintage Mido Logo Swiss Made International Warranty DESCRIPTION With its retro look and extreme reliability, the Multifort Powerwind pays a stylish tribute to Midos expertise. In 1954, the Powerwind movement was first produced, giving rise to a revolutionary model which bears its name. At the time, this automatic movement it's Midos's most precise and reliable, which represents a great evolution.