First is a Model 17-2 (22lr) K554XXX
2sd one is 38 SPL #108XX (has special CTG) on side of barrel, and is Stainless.
K554xxx = late 1963 or early 1964.
108xx = that SN is too early for a stainless gun, nickel maybe?
See pic for location of serial number. Also, is it a 5 or 6 shot?