I was bored and found a HP-27S

[walter b]

(06-10-2014 04:39 AM)John R Wrote:  The 27S definitely seems like a hybrid of the 17B and 42S, with maybe 60% of its DNA from the former and 40% from the latter. Which means its numerical designation is particularly fitting, since (0.6 * 17) + (0.4 * 42) = 27.

AFAIK the 27S came before the 17B. But it was a nice theory ...