For reasons which escape me, Samba's smbclient tool offers a dialect called "NT LANMAN 1.0". It's typically nestled in between the "Samba" dialect and "NT LM 0.12".

    Dialect[0] = "\x02PC NETWORK PROGRAM 1.0"
    Dialect[1] = "\x02MICROSOFT NETWORKS 1.03"
    Dialect[2] = "\x02MICROSOFT NETWORKS 3.0"
    Dialect[3] = "\x02LANMAN1.0"
    Dialect[4] = "\x02LM1.2X002"
    Dialect[5] = "\x02LANMAN2.1"
    Dialect[6] = "\x02Samba"
    Dialect[7] = "\x02NT LANMAN 1.0"
    Dialect[8] = "\x02NT LM 0.12"

I spent a couple of hours one day trying to figure out what this dialect was all about and why smbclient was sending it. Even more annoying, Samba was selecting it instead of "NT LM 0.12".

Jeremy Allison says that, internally, "NT LANMAN 1.0" is the same as "NT LM 0.12". I'm still not sure why it's there or why it is selected instead of "NT LM 0.12", but it is (apparently) harmless.

NT LANMAN 1.0 == NT LM 0.12