G3 guns and completion dates in a no-treaty scenario

Would the 1921 G3 carry 16-inch or 16.5-inch guns without a naval treaty, and when would the ships be laid down and completed?

The proposed no-treaty sequence uses 16.5-inch guns and estimates completion around 1923, with the construction timetable treated as counterfactual.

In this no-treaty scenario, the G3's gun is identified as 16.5 inches, continuing the British progression from 12 to 13.5 to 15 inches. The construction estimate assumes work beginning around 1920 and completion by about 1923. Later remarks distinguish the 16-inch guns associated with treaty delays from the larger weapon originally envisaged. The projected follow-on battlecruisers are discussed in terms of 16-inch guns, while battleships might standardize on 18 inches. These are the proposed design sequence and counterfactual timetable discussed in the video.