@rascal__ W34 Lot# 9 :
w=34, ins= 32.5, f/r= 11, b/s= 14.5, u/t= 12.75, kn= 8.5, l/o= 7.5
around 3.5 y/o = approx 20 mos effective wear
'been machine drying them after 1st yr & 2 washes.
What year? The 501 varies entirely in details denim and cut dependent on when it was made etc. Samurai has models that are repros (to some extent) of said Levis, that is to say they replicate the details and silhouette according to the brand's philosophy. Sams are numbered differently also so if I were you I would visit b_f's fit guid and the Samurai thread over at Sufu.