I've never seen an open 6 and a closed 9 on a 3135 disc, nor on a 3035 for that matter. You may want to ask if its actually a actual picture of what you're going to receive.
But for whats its worth, I've bought many date discs for 3135 and 3035 in my 20+ years of dealing with Rolex watches and never kept or used an aftermarket disc on a cal 3135.
Mainly because they never lign up properly but sometimes the font/size is off....on top of the alignment problem. Spare the headache of wasting money on a few discs that won't solve your problem and get a genuine disc. With Luck you'll find one for $100 on the bay, and be done! Besides it will always be worth what you paid if not more.