I bought this Portland style putter of ebay with a flow neck in a sea mist like color. My question is about the serial numbers, it has a serial number on the stroke lab shaft 6T.... and there is a serial number laser engraved towards the heel of the putter. Is this normal for a garage putter or even a tour issue. Anyone else have or know of this. Reached out to odyssey but they would not help. I was just wondering because this combination is not available to order online. Thanks for any info.