This badly cracked bead is off an older Andersen slider window, at least from what it appears. The arrow in the one picture points to the rubber portion that touches the glass. It is roughly 5/8" tall, but it's hard to tell exactly since it's cracked in a couple places.
Dave Sr. from SWISCO responded:
November 27, 2018
I believe you have the 55-310 Andersen glazing bead for the older 3/8" thick insulated glass. Look it over and see what you think.