It always had one from the beginning when they were introduced in 1937.
$45
The Sweet 16 has always had a Gold Trigger. Developed and tested in 1936, the Sweet 16 (which is the lightweight 16 ga of the Auto-5) was first released to the public in 1937 with a Gold Trigger. All Sweets since have had a Gold Trigger. There has never been a sweet 16 without a gold trigger.
Browning sweet 16 model s76727 value
50-600 uSD
browning sweet sixteen serial number 5s43804 what year was it manufactured
50-500 usd
Gold plated. Less than 1/10 of an ounce
55-550 usd
See the link below
Not a valid Browning serial number.
The gold trigger usually means that a Browning A5 is a Lightweight,in this case a Sweet Sixteen made after 1947. However, the sweet Sixteen was available from 1937 with this option and it has nothing to do with the value of the gun. Choke,barrel type,stock type and most of all condition are the driving factors with these guns. === === A pre war sweet 16 (1937-1939) has a gold trigger as did all Sweets. 1947 has no bearing on the question above. The script lettering on the left side of the receiver saying "Sweet Sixteen" showed up in 1948 + 49. Provide the serial number to determine year of mfg, and condition, then re-ask your question on Wikpedia.
First place to try would be a local gunshop.