Four of the five Brookfield CD 164's I've found today have the base shown in my pic. Is it a round base with MLOB? I don't see any RB Brookfield 164 listed in my PG. Are they in the new 2011 edition? I see several in my PG that have MLOD with SB but no insulators RB MLOB. Are the four insulator I have unlisted or was there a mistake in the PG??