Adding a clock to 70 dash

[Accelo]

It looks like the 73-79 clock or the 81-87 clock can be retrofitted into the 70's style C10's.
They differ in the placement of the knob used to set the time.
Both are available aftermarket.
I am planning on installing one into my truck but am wondering which on works best for the transplant. I am including pictures of both below;

Early 73-79 has the time reset on the top of the clock.