My March 1954 Master Parts Catalog lists no interior mirror prior to 1947, one interior mirror for '47-50 (986632), one for '53 (986651), and one for '54 (986948). There is no interior mirror listed for '51-'52.

For the record, outside mirrors are as follows.
'31-54 ALL outside (5-1/16 OD) mirror only 3696632
'39-50 ALL outside, less bracket and arm, black (6-3/16 OD) 602073
'47-53 ALL outside, mirror (5-1/32 OD) w/adj. arm (extendable 8-7/8) 986440
'54 All outside, mirror (5-9/16 X 7½) w/adj. arm and atach. parts (extendable 8) 986985
'54 ALL outside, mirror (5-9/16 X 7½) 986986

This info is from the commercial section. It does not include car applications.

"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.