Up for high offeris this very nice ORIGINAL REBUILT Carter YS 637S carburetor. I disassembled carburetor and soaked in carb cleaner, blew out passages with compressed air. I rebuilt with a NEW MASTER REBUILD KIT. Carb has I-507 on the base and bottom of the mounting flanges. Carb is correct for the M38 ONLY.Carb is the military waterproof version and will NOT fit the M38A1. Adjusted float to specs and has correct metering rod. Diaphragm springs are in the correct places. I poiished the outside of the carb and the reflection from the flash made some of the pictures not look as good as they could have. I ship WORLDWIDE via USPSin a Medium Flat Rate Box or Priority Mail, which ever is less. I ship in 1 business day as soon as payment clears and I have a confirmed shipping address. I welcome local pick up of parts and I will gladly combine shipping cost for multiple sales won if possible. This is a sale!!! Feel free to ask questions! offer with confidence, check out my responses and return policy! Thanks SO much for looking! GOOD