Since this thread is the first hit in a google search for this shotgun, I thought I'd add in some information that hasn't been discussed yet, in case someone else is looking for info on their Savage single shot.
I just realized that I have some older catalogues laying around the house, so I just pulled them out and, yep, there it is - The 1981 Savage catalogue.
On page 7, they show the model 311 SxS and the model 94-C (apparently there's a dash in there).
There's also mention of a more cost effective version of the 94, the 9478.
As described in an earlier post, the 94-C shown in the catalogue features the checkered pistol grip and fluted forearm stocks, but the 9478 shows the plain stocks, like my brother's gun.
(side note: the checkering seen on the pistol grip of both the 311 and the 94-C must've been a "standard" design, as it is the same one that was featured on the pistol grip of my Stevens 511 SxS).
The main difference between the two varients is in the location of the unlocking lever.
On the 94-C (and the original 94, I suppose), the lever is located on top of the receiver, just behind the hammer.
On the 9478, its a "button" (for lack of a better word) that is almost the same height as the trigger guard and located right in front of it.
In fact, it appears there is a slot in the front of the trigger guard of the 9478, that allows for that "button" to swing freely through the trigger guard.
The 9478 and the 94-C came in the same gauges/barrel lengths, except that the 9478 was not offered in 16 ga. and there was no 32" barrel option in 12 ga.
All options (except the youth options) were full choke.
Oddly enough, the 94-C is the "adult" version, but the youth version is listed as the "94-Y", so anyone who has a gun marked as such, now you know what that's all about.
According to the listed measurements everything is the same except the length of pull (14" vs. 12.5").
All 94-C's were tagged with an MSRP of $81.85, except the 12 ga. "Long Tom" version, which went for $83.60.
Oddly enough, the youth models were more expensive, being suggested @ $91.80 (what's wrong with that picture?!).
As per their "cost effective" status, the 9478's were a little cheaper.
Regular versions were all listed @ $75.60, regardless of gauges and barrel length (just like the 94-C).
Again, the youth model is more expensive @ $81.85 (???).
Apparently there were two "Long Tom" versions made for the 9478, one in 12 ga. and one in 10 Ga.
10 Ga. was $95.30 (!!!) and the 12 was listed at $77.50.
Weights are listed as follows:
10 & 12 Ga. "Long Tom" guns averaged 8.5 lbs.
All other Adult guns averaged 6-6.25 lbs.
Youth models averaged 5.5 lbs.
There is no mention that the 9478 was a new model in 1981. In fact, if I had to take a guess, I'd base it on the model designation and say its first year of production was 1978. HOWEVER, that is only speculatioin on my part and so far, further research has not determined an originating year of production for the 9478 varient.