Molded Crab Meat Salad

This is undoubtedly a recipe that my grandmother received from someone else. It may be that she tasted it at some event and asked for the recipe. On the bottom of the recipe card it says I double this for bridge club, and while many of a Saturday evenings were taken up playing cards, bridge was never one of them. Unfortunately, this is one of the recipes that is merely a list of ingredients.

1 pkg. lemon jello
1 1/2 cups boiling water
3 Tbsp. vinegar
1/2 tsp. salt
2 cups crab meat or other cooked fish, flaked
3/4 cup celery, chopped
1 small can pimento, chopped
1 small onion, chopped
1/2 cup mayonnaise