From Burt's 1973 TV Special "Burt Bacharach: Opus No. 3". Features Stevie performing Bacharach's 'Alfie' on Chromatic Harmonica.
The full length video can be found in several formats here: bedazzled.blogs.com/bedazzled/stevie_wonder/
In case you are interested he was playing this model harmonica at the time:
UK: amzn.to/3hIHtF7