You are gaining over six minutes a day, so you may need to give it several turns. In clocks there are almost always exceptions to every rule, so set the time, turn the dial to the right and see if the clock is slowing down. Usually you turn the thumb wheel to the Left to make the clock run faster and to the Right to make the clock go slower. Ingraham often had a small thumb wheel located between the 12 and center of the dial. However, from your discription I am going to guess that your clock was made by Ingraham. There isn't a uniform rule about the direction you turn to adjust the time keeping. The lever moves along the outer coil and changes the effective length of the spring. Simply move the lever in the appropriate direction. There is usually a small lever close to the balance wheel with markings indicating slower (-) or faster (+). Shorter springs become wound more quickly and reverse the wheel more quickly. The wheel can only rotate so far in one direction before the force of the spring overcomes the momentum of the wheel and the wheel then reverses direction. These clocks count the oscillations of the balance wheel, which is attached to a spring. Some clocks don’t have pendulums but instead have a balance wheel similar to that on a watch. Turning the disk in the direction of the S forces the weights farther from the center and the pendulum spins more slowly turning the disk in the direction of the F forces the weights closer to the center and the pendulum spins faster. On the top of the pendulum is a small disk that is usually marked SF (slower/faster) or RA (retard/advance) with arrows indicating the direction to turn the disk. When the skater pulls her arms in close to her body, the skater rotates rapidly. Because the pendulum is spinning instead of swinging, the physics are more like those of a figure skater: when the skater’s arms are far from the body, the skater rotates slowly. The principle here is a little different. Simply slide the bob up to go faster (speed up), or slide the bob down to go slower (slow down). It is usually held to the stick by friction. The bob on most cuckoo clocks is carved to look like a leaf. To make the clock go slower, turn the key toward the S (or R). To make the clock go faster, turn the key toward the F (or A). French clocks may have an R (Retard) and A (Advance). There is usually a small F (Faster) and S (Slower) printed on either side of the dial. However, it is also common to see it below the “12” or even below the arbor that turns the hands.

It is usually located just above the “12” on the dial. Pendulum clocks with a time-adjustment arbor (French and American mantel clocks) The time-adjustment arbor is a square shaft that is much smaller than the winding arbors.The bob will rise, making the effective length of the pendulum shorter and the clock faster. To speed up the clock, tighten the nut (turn it toward your right). The bob will settle lower, making the effective length of the pendulum longer. To slow down the clock, loosen the adjustment nut (turn it toward your left). Pendulum clocks with a time adjustment nut (Grandfather clocks, most wall clocks, German mantel clocks, shelf clocks, etc.) The adjustment nut is a large nut at the bottom of the pendulum just below the large disk or weight called the bob.

1950s swing clock mini grandfather