BINKS #7, BINKS MODEL #15, DEVILBISS TYPE MBC-3 SPRAY GUNS, THE BINKS #7 AND THE DEVILBISS GUNS BOTH HAVE SHARPE QUICK RELEASE SIPHON CUPS.  THE BINKS #7 HAS A MODEL 400 SHARPE SIPHON CUP, AND THE DEVILBISS HAS A MODEL 450 SHARPE SIPHON CUP.  THE DEVILBISS GUN IS COMPLETE,  THE BINKS MODEL #15 IS MISSING THE PAINT SIPHON CUP & NEEDLE VAVLE, AND THE BINKS #7 IS MISSING THE TRIGGER (PART# 54-753), SCREW (PART#54-759), STUD (PART# 54760) AND NEEDLE VALVE THAT GOES TO THE EXTRA NOZZLE 36SD (PART# 6100-1808-9).  THE AIR NOZZLE AND NEEDLE VALVE ON THE GUN IS A 39S FOR HEAVY MATERIALS LIKE METAL FLAKE.  THE 39SD IS FOR LACQUERS, ENAMELS, VARNISHES, SHELLACS, PRIMERS, EPOXIES, AND URETHANES.  THE BINKS #7 WAS USED FOR LACQUERS ENAMELS & URETHANES, DEL-CLEAR.  THE MISSING PARTS CAN BE ACQUIRED ONLINE FOR AROUND $50.00-$60.00 INVESTMENT.  THE DEVILBISS GUN WAS USED AS A PRIMER GUN ONLY.  BOTH WERE CLEANED WHEN STORED MANY YEARS AGO, MIGHT HAVE TO GET A REBUILD KIT FOR BOTH.  NEVER USED THE BINKS MODEL #15 GUN, IT NEVER HAD A CUP.