As a general rule, you want to extract as much info as possible from these Italian records. There are other subtexts, inferences and connotations beyond the basic data to be noted as well. The facts that Rocco was a tradesman (probably a skill handed down by his forefathers) and that he could read & write indicate that he was from at least the upper-middle class in this town. The children of farmers typically went to work--NOT to school.
While Italian social structure was not as rigid as say the caste system in India..it was not as 'fluid' as we like to think it is here in the USA. If you spend time in this town's records and find men given honorific titles like Don or Siqnore...you know they are the 'elites' of this town. That would put a clearer view to Rocco's position. My Aunt said about my paternal grandfather (son of a farmer), that he was very 'LUCKY' to have married the daughter of a blacksmith .
Depending on the town record keeper's OCD level...the ages on the birth record are either very accurate or pretty good ball parks....their ages on their marriage record will always be more precise.