Rick Brett:

The '71'72'73 models (H2) had the exposed CHROME end caps (later replacement items were Zinc plated)

Frame no 02080 - Totally original bike, 400 miles from new :

It may be possible for a VERY small number of machines to be fitted with a previous years pegs but the numbers would be in 10's or low hundreds.

H2b, Frame no 41172 - Totally New Old Stock Bike ZERO miles, Countersunk CHROME end cap - again, late replacement pegs were Zinc plated and not chromed.

Early H2c, Frame no 42880 - Totally New Old Stock bike ZERO miles has the fully enclosed rear pegs and from that we can deduce that every bike from at least this point had the enclosed pegs.