yars revenge w/3 holes above where the screw is located on front.

how uncommon is this? after going thru my entire collection of about 500 carts this is the only one that
i have found.also it seems that the locking board protector is missing the inner peice which i
thought had been removed by someone at some point but after much closer inspection it would seem
that this cart has never been opened(?) any info would be grateful)