Note in the 2011 PG the one on the left - as per verification directly with Woody - is now a 162.1 Narrow Dome

Here is a picture of a CD 162 'Narrow Dome' on the left and a CD 162 on the right -- in sunlight. To view a picture of the same two insulators under a lamp: [id=50868410]. To view a sunlit picture of a CD 162.1 and a 'Narrow Dome' under a lamp [id=50868511]. To view a CD 162.1 and 'Narrow Dome' in sunlight: [id=50868117]