Absolutely sounds like a #4 DeLuxe. I had one in 28 ga with 26" barrels, but it had a single trigger so I can't comment on the non-articulating front trigger.

It was a very nice, well-engraved and finished gun which I picked up for a very low price in a private sale. The trigger was an issue as it doubled with some frequency... I ended up trading it in as part of deal for a 28 ga AyA #2 rounded action, with the proper number of triggers.

Sounds like you've found a very nice gun. Enjoy!