Caliber 6R15-00E0 Twenty-three jewels
Compass inner bezel (crown at 4 o'clock)
Screw crown at 3 o'clock
Water resistant to 20bar
I was influenced by Martback's writeup of the Alpinist heritage on his "GMT+9" webpage here. In fact I regretted deciding a little late as I thought the cream dial version looked more "Alpinist" to me and alas, it was discontinued awhile back. The sunburst green dial version is not bad too as I love the way the gold-lined cathedral hands and arabic numerals catches the light.