Here is a classic Fred Locke two-piece transposition insulator. It is in the classic fawn or tan color that most early Fred's I know of are seen in. The photo shown is of the insulator held together (nicely) with a standard pin cob. I am going to show you two subsequent pictures here: one of the two parts separated; and the other a top view of the assembled insulator (showing the best I could with the lettering).