Well, he was a Navy Sailor with at least 12 years of service(4 years for a good conduct medal back then). Looks like he pulled convoy duty in the Atlantic and in the Caribbean, as well as some service time in the Pacific. It does not look like he was directly engaged in any major campaigns, as there are no stars in the Campaign medals. With all of those years, I would expect to see an American Defense medal(pre WW2) or a National Defense Service Medal for the Korean War time frame (1950-3). Perhaps this is the lower bar of a multi bar medals rack?