Seems he was an SOM3/C, instead.
I went digging through my Mother's things and found a paper that concerned my uncle's body being returned, it has his grade as SOM3/C.Also, found a copy of his obit which has him as a Sonar-man 3/C.
The only thing on the uniform is the UDT insignia.
So, I'll order the records to check all this out -- I would like the correct info for our family history records. ---------And, I'd like to rule out that small uniform being his.
Thanks Bob C., and John Y. (who emailed us direct) for the info.