Vintage Bullet Mold MARKED D-311 955, 30 cal, DOUBLE CAVITY MOLD, MODERN BOND?

Description

VINTAGE DOUBLE CAVITY BULLET MOLD MADE, I BELIEVE BY MODERN BOND Corp. AND IS MARKED #D-311 955 AND BOTH HALVES ARE MARKED WITH AN H. THIS IS THE MOLD ONLY AND DOES NOT INCLUDE A HANDLE.
PER MY RESEARCH (from forums and information I could find)
Just about every mold maker has a different "code". Lyman/Ideal molds are marked with three digits indicating the "size-to" diameter followed by three more that are just a more-or-less chronological sequence number (though these have in some cases been re-used from discontinued molds); another group of numbers appearing on both blocks are a "match number" to keep the pair together. Some makers use a pretty logical diameter + weight number; some others, like Hensley & Gibbs just use a sequence number, and you have to have a chart to decode them - some of these are posted on CASTPICS. One weird one was used on the old Modern-Bond molds (which originated the separate blocks and interchangeable handles back in the '20's, soon copied by Lyman). They used, for example, "D-311-955", meaning the fourth (A, B, C, D, ..get it? ) design in 0.311" diameter (with a new sequence for each caliber), 0.955" long (150 grs.); a double-cavity mold I have with two different weights/lengths of the same bullet is stamped "D-311-955-1145", with 150- and 180-gr. bullets, the latter 1.145"long.
BELOW PICTURE IS A SNIP OUT OF AN OLD MODERN BOND CORP. REFERENCE SHEET WITH A DATE ON IT MAY 1st 1944 ABOUT MOLDS NOT BEING AVAILABLE UNTIL THAT DATE
PLEASE VIEW THE PHOTOS. THEY ARE PART OF THE DESCRIPTION. PLEASE ASK ANY QUESTIONS YOU MAY HAVE BEFORE YOU BID OR BUY IT SINCE WE WANT YOU TO BE HAPPY WITH YOUR PURCHASE.
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