Ball pint jar error???

[ccholley]

I picked this jar up at an auction for a quarter and after getting it home and cleaning it up I noticed a few things and wondered if this jar is an error jar and also wonder age and potential value if it is thanks!! It is a pint sized jar and on the bottom it appears to have both a number and roman numeral. It looks to be a 7 and an X (for 10). I have never seen one with both kinds of numbers before. Also the a in Ball looks a little squared off to me....Additionally the C in Perfect looks more like an O. That are your thoughts?? Thanks!!

 

[ccholley]

Photo of front of jar

 

[ccholley]

Bottom of the jar

 

[deenodean]

welcome to AB-N and the world of bottles.
Nice jar. It is listed in the Red Book # 10 ( a price guide to over 10,000 jars ) under the ' Error Ball Perfect Mason Jars' as # 284-6. It is circa 1915 - 1923 , qt or pt = $ 8.00 - 10.00
Here is a Ball collector web site. http://balljarcollectorscommunitycenter.yuku.com/directory#.UBGXcKPuD3A

 

[RED Matthews]

Hello ccholley; Your jar looks great. The C was obviously cut as an O, Mold maker error.]

The circle near the center of the bottom is a baffle valve mark and this is relative to the settle blow air supply, in the parison forming cycle of making.

RED Matthews