Why did the 1974-S silver proof make it into the list, but no other proof coins,clad or silver, are on it. ONLY circulation strikes and business strikes I was under the impression were allowed in the low ball registry? now with the new coin allowed , shooting my avg to hell, with the reverse scoring and sticking the proof 69 in my lowball set, that I need to remove now, but not out of inventory. Was it just an error that the silver proof was included in the low ball set, or was it just another wrench in the gears? Don't know where else to ask this pertinent question, hope that you can shed some light, it now seems like silver proofs are included? Am I going to need more coins to have the complete set now, or, I'm not really sure what's going on. Yours Scott