I'll take an educated guess after looking at the details. No chrome fork crown, only the Schwinn round quality decal on seat tube, no added accessories, rolled stem, painted fenders and missing the year letter in the stamped serial number.
That would be a January SN'd 1966 Typhoon with a changed out chain guard.
(1966)
Date ----------------- Serial #`s From --------------------- To
01/24 -------------------- A11111 -------------------- A15412
01/25 -------------------- A15413 -------------------- A19954
01/26 -------------------- A19955 -------------------- A23566
01/27 -------------------- A23567 -------------------- A28010
01/28 -------------------- A29011 -------------------- A31157
01/31 -------------------- B11111 -------------------- B14602
02/01 -------------------- B14603 -------------------- B15761
#'s above recorded in error
02/01 ------------------- BB00001 ----------------- BB12363
02/02 ------------------- BB02364 ----------------- BB07340
http://www.trfindley.com/flschwinn_1961_1970/1966dlr_Typhoon.html