1910 and 1912 Gibson mandolins would be "pre-Loar". Lloyd Loar joined Gibson in 1919 and left in December 1924. I've got an old 1914 F-4 that is terrific, but it ain't a Lloyd Loar.

That being said, you might consider getting a decent, low-cost "festival" mandolin...one you wouldn't mind taking to a festival. A few years ago I found a Strad-o-lin from the 1940s that I paid less than $100 for. The hard shell case I bought for it cost more than the instrument. I had the tuners replaced and the neck worked on and it is my festival mandolin. Collectors turn their noses up at Strad-o-lins because they are made of laminated wood, have what I call "fake" f-holes and have "Strad-o-lin" spray-painted (stenciled) on the headstock. IMHO, that's exactly what you want to take to a festival.

-Greg