springfield,JStevens Identification help

[winetoad]

I have an old 20 ga Springfield, JStevens single barrel shotgun that I'm trying to get info on.
Springfield,JStevens is marked on one side, circle with 21 stamped inside it.
Under the forearm I find the letter I,903 under that and the letter J. Barrel is marked forged,proof steel.
Also is a marking that looks like either z06 or 206.
Not sure if this is a model 94 or what. Numrich has a lot of different model 94's, so I'd like to narrow my make and year down.

[0321jarhead]

Is the shotgun hammerless? Also pics would help.

[Emdawg]

Ummmm... pictures would help immensely.

[winetoad]

Will post pictures soon. It does have a hammer.

[winetoad]

Pictures added

Pictures of the Springfield JStevens added for identification.

[0321jarhead]

This is what I found.....

j stevens arms company of chicopee falls massachusetts designed many models of these single shot shotguns, all models looked similar, although I find no model of "springfield" and no cross reference that they ever made one for springfield armory or springfield arms companies. According to my literature "they were designed as inexpensive, utility grade weapons and there is little or no collector interst in them at this time." NOTE**** many of these shotguns featured damascus barrels and SHOULD NOT BE FIRED WITH MODERN SHOTSHELLS AS THEY TEND TO RUPTURE OR EVEN EXPLODE!!!!! As with any older weapon, it should be checked by a gunsmith to determine if it is safe to use.
Values listed for all models I found is:$150-$176 in excellent condition. $100 to $125 in very good condition. These shotguns were made in the late 1800's to the early 1900's. Source: gun digest book of guns and values 2008 edition. & early american shotguns (out of print)