I noticed the same gun in the recent Little John auction. This is the first Lindner Daly I have seen with this style of action reinforcement. It is interesting, but I can't say I care for the aesthetic.

The first Daly I have noted with Wittener steel barrels is Serial #1130 which puts it circa 1901. Please note though that many of the entries in the database do not list the barrel composition. Witten barrels could show up several hundred guns earlier. This is just the first one I noted with this serial number. Krupp steel is found as early as Daly #705, circa 1896/7.