Prototype Couplers has been providing the world's most accurate model railroad couplers since 2023. Sergent Engineering was the first company to manufacture and sell a "true" scale size HO coupler. Sergent Engineering has since closed its doors but the dream lives on with us. We have worked with Frank Sergent to get these couplers back into hands of modellers. Frank has authorized us to use his tooling. This means our die-cast couplers are still original Sergent Couplers! Infact, our investment cast couplers all use original Sergent Engineering die-cast knuckles. We source our balls and springs from the same suppliers Sergent Engineering used. Our uncoupling wands are also sourced from the same suppliers. All our products(couplers, springs, balls, wands) are 100% made in the USA!
Prototype Couplers has been providing the world's most accurate model railroad couplers since 2023. Sergent Engineering was the first company to manufacture and sell a "true" scale size HO coupler. Sergent Engineering has since closed its doors but the dream lives on with us. We have worked with Frank Sergent to get these couplers back into hands of modellers. Frank has authorized us to use his tooling. This means our die-cast couplers are still original Sergent Couplers! Infact, our investment cast couplers all use original Sergent Engineering die-cast knuckles. We source our balls and springs from the same suppliers Sergent Engineering used. Our uncoupling wands are also sourced from the same suppliers. All our products(couplers, springs, balls, wands) are 100% made in the USA!
Fast Shipping
Most orders ship from our multiple warehouse same or next day.
Sustainable Packaging
We ship most orders with paper tape or packing paper whenever possible.
Regular Order Updates
Receive updates as your order processes and during its travel to you.
Shipping Options
We offer shipping rates with USPS and UPS, choose from several shipping options.
