These appear to be the Makalu. La Sportiva made at least 2 different models.
Makalu - heavier leather and accepted step in crampons. I am not sure if the newer version deleted the step in crampon option
Makalu M Hike - thinner leather and do not accept step in crampons.
Hard to tell from the pics, but these do not appear to be able to use step in crampons.
I thought they stopped making the M Hike version many years ago, but i could be wrong.
I had a pair of each. I used the M-Hikes for about 15 years of SAR work. I used the regular version for operations when a heavier boot was needed.
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