Opps!
Prior to mid 80s, per one Canadian site, K=June and the m is a spacer:
System 2
Most builders used this format from the “mid-70’s”
until December of 1984 and some still continued to utilize the previous (earlier) system.
(Initially this system was adopted and “suggested for use” and later on it was not a suggestion by the Coast Guard but a mandatory request. That’s why some manufacturers took their own time to comply or not.)
ZZZ 12345 G77E
ZZZ - MIC code (Unique to the company that built the hull)
12345 – Hull Serial number
G77E – Month and year of manufacture
All of this goes with the following letter designations for each month as follows:
August – A Sept – B October – C November – D December – E
January – F February – G March – H April – I May – J June – K July - L
Character
nine is the
spacer letter (G) – before the year.
Character
ten and
eleven are the last two numerals of the model year, which begins in August of the preceeding calendar year.
Character
twelve is a letter of the alphabet indicating the month during which construction or assembly began.