DANG! Those were the days all right. I wish I could get my hands on a real Model 9, the ones with the crimped burner bell and a generation one white pump. Now those are collectors items (to a guy like me anyway).

They swapped out the generation one white pumps with the square knobs to the generation two yellow and black pumps with the round knobs pretty early on. The yellow and black pump went through many iterations including some with pins that held things together and aluminum fuel pick up tubes. Very interesting how many changes there were year-to-year in the early years of MSR. Unfortunately, no one kept records and it's probably impossible to catalog all the variants. I for one have neither the time nor the money.

REI has thankfully been out of the picture for about a decade now.

As far as I know that old offer is still in effect, BUT I wouldn't do it if I were you. The old black and yellow pump, particularly the later variants with the plastic fuel pick up and without the brass pins, is probably the best pump MSR ever made. I'd try to repair it if at all possible. As long as you haven't cracked the plastic of the pump or lost any of the parts in the check valve, your pump can be made to work again. DO NOT under any circumstances pull out the air supply tube (typically broken off at the base of the pump). That air supply tube is all that holds the spring loaded check valve in place. Lose those check valve parts, and your pump is history.

If you ever do lose your mind and trade in a black and yellow pump for one of the modern pumps, it will work. All MSR pumps of all generations are interchangeable except the Dragonfly pump. The Dragonfly pump will work only with a Dragonfly stove.

Ha! But thank you.

HJ