Correctly stated, all Art Young Broadheads are Pre Production as Art never formally went into production, advertised and sold them due to his untimely death on February 26, 1935.
Signature heads commonly sell for several hundreds of dollars, depending on condition and provenance.
Art's Signature Head, (so named because it bears a facsimile imprint of Art's famous signature), is the best known of his broadheads. Most variations of it are simply the location of the ferrule being in a different position on the blade. Some ferrules are flush with the rear of the barbed blade, other ferrules are recessed above the end of the barbs.
Before Art made the Signature heads, he made many heads that resemble the Signature heads in some regard. I named these heads "Pre-Signature" because that is when they were made, prior to the Signature heads. I have handled and photographed more than a half dozen variations of these heads. Although some closely resemble the Signature, the Pre-Signature heads are much rarer and much more valuable then the Signature Heads, especially if it can be documented that Art made or used that particular head & arrow.
Authentic Pre-Signature Heads are extremely rare and obviously have 4-figure values.
The chrome plated Pope & Young Club Commemorative remake of Art Young's Signature Head is a common trinket that many non-collector bowmen acquire as memento of the most respected bowman of the first half of the 20th Century.