Hi Steve, yes mate, according to my info, your first SB is the baby of the family.... As for dating a Kirby Tecumseh, I haven't a clue there, Steve. I know you can date a Briggs by it's serial number, as for the Kirby....I will try and do a bit of research.
Please do not PM me asking for support. Please post your questions in the appropriate forums, as the replies it may receive may help all members, not just the individual member. Kindest Regards, Darryl