OID value: 2.6.6
David Chadwick describes in "Understanding X.500: The Directory" page 379: Back in 1988 the experts definining the X.400 recommendations had some T-shirts made, and each T-shirt was allocated an object identifier, under the stub joint-isode-ccitt(2) mhs-motis(6) group(6). Thus each T-shirt owner was effectively allocated a unique object identifier. Al Grimstad, one of the experts, purchased the T-shirt with the number (OID component) 5. Subsequently Al attended NADF meetings, and donated arc 2 below his node, to the NADF. So every NADF schema definition begins with the OID stub 2 6 6 Grimstad(5) NADF(2). Al has achieved one of his life long ambitions - eternal recognition!
See also the OID Repository website reference for 2.6.6