Omega - Presentation vs. "Regular"
I'm a newbie to Omega collecting, and I'm treading very carefully into this potentially expensive addiction. I've seen several "presentation" Omegas on eBay and other places. By "presentation," I mean the the ones with things engraved on the back like "To John Jones, ACME Inc., Jan. 12, 1957," that used to be given out as gifts in the old days when people retired. I've noticed that these watches tend to sell/be listed for less than "regular" Omegas.
Does anyone have an idea as to the reason for the price difference? Were the presentation Omegas made more cheaply? Is it an aesthetic thing (i.e., some people don't want a watch with someone else's name engraved on it)? Are most of these fake? Any insights would be appreciated.