I agree with Jack on this: all Victor guns were true sidelocks and there was a range of model names for the sideplated boxlocks built on the Avant Tout action as described by Mike above.
I believe the "Extra Quality Victor Grade sideplated boxlock" for sale on Safari Outfitters site(http://www.safarioutfittersltd.com/EnglishPage5.htm) is in fact a sideplated boxlock "Tower model" not a Victor gun at all.
Similarly, one of pairs of C&H "SLE's" on Bass Pro Shops site are clearly sideplated boxlocks, not sidelocks as advertised (ihttp://www.basspro.com/webapp/wcs/stores/servlet/CFPage?storeId=10151&catalogId=10001&langId=-1&appID=36&viewMode=thumbnails&catID=52&direction=DESC&gunid=3893&mode=viewGun). The other pair on this site looks like SLE's.
The problem is that C&H did not put model names on the boxlock guns except for "Avant Tout" on the rib to denote the action type. And the uninitiated confuse sideplated boxlocks for true sidelocks. Bass Pro shops should know better though!
