Agreed, 6 speed was firmly entrenched at this mid-range sport bicycle level by the time that Victory was released. Most Italian bicycles favoured Regina freewheels and they were already offering 6 speed models in the very early 1970s. By 1978, Regina was marketing a 7 speed freewheel, though it was rarely spec'd on consumer product at that time. As previously noted, it is almost certainly a freewheel, as opposed to a cassette, unless the hubs/wheels were upgraded.

The subject bicycle appears to have Victory calipers, headset and crankset. The rear derailleur is Chorus and the shift levers, as noted, are Syncro II.

Tommaso was the house brand of Ten Speed Drive, a Florida base bicyclen importer and distributor. The brand was established in 1984 to market cycling accessories and apparrel, with frames and bicycles being added for the 1985 model year. The name is Italian for Thomas and is derived from the owner's name, Tom Eason. The frames were sourced in Italy, primarily from Billato. The frames were imported unfinished and were painted and prepped in the USA. They were sold as both bare frames and complete bicycles. They didn't have traditional model names but were named after the tubeset and component group.

I can't identify the tubing decal from the photo but it looks like the background is white or silver, so it may be the Columbus Matrix/Cromor decal. If so, that would bump the earliest date up from 1985 to 1986. We also know that it's no later than a 1987 model, as they added a top tube Tommaso decal for 1988. That would indicate that Chorus rear derailleur and Syncro II levers are a later upgrade.