Fox Collectors

I am new to the board and recently posted below "Newbie SW Serial".
My new 16 ga gun has ga. 28" bbls and weighs 5lb 12.5 oz.
Serial # 3504## > I learned was mfg in 1912-13.

Chokes: There are no choke markings at all. Was there a 'standard' for how this gun might have been choked i.e.. F/M?

Chambers: How were the guns of this era chambered? was 2 5/8" the standard?

Weight: This gun is delightfully light and well-ballanced. It seems to be extremely light for a 16. Were all of these guns this light or is this a special lw version?

Also- the safety slide is very stiff. It seems to operate normally other than requiring abnormal pressure to slide if off & on. I don't believe it is an external lubrication issue. Any suggestions?

Many thanks-

My 16 gauge A grade with extractors letters at 5 lb 10 oz. That is with 26" barrels. Yep, they are indeed light.

A 16-gauge Fox of that era would normally be chambered for the then standard 2 9/16 inch shell. With the A.H. Fox Gun Co. policy of holding chambers about 1/8 inch shorter then the intended shell, Philadelphia and early Utica 16-gauges normally have chambers 2 7/16 inches deep. The normal choking for a Sterlingworth Field (28-inch barrels) was modified and full, though different chokes were the one Sterlingworth no extra cost option. Fox chokes were only marked on the hang tag. There certainly doesn't seem to be any choke markings on the guns.