I am searching for information on Alex Lienert but not really turning up anything. So far I have seen crampons and pitons made by Alex Lienert. Alex Lienert products date back to the 1930s.
Made in Einsiedeln Switzerland
Two Alex Lienert pitons are shown in the 1932 American Alpine Journal, items B1 and B2
A few years back on ebay three Alex Lienert pitons surfaced and I was able to win two of the three auctions. They are in mint condition and are very well crafted!!