I was wrong the breach block does swing to the right and it is I. Hollis and son.It looks like the same type of gun with a few differences,on the breach block there is a thumb release to open the breach,and nowhere on the gun can I find anything that is marked Snider.I will try to post pictures.I think it may be the sporters.Also there is a small bar on the left side that maybe for a strap??Any ideas as to where I could find the value of these guns??I paid $200 for it,was it worth it??Thank you