I forgot I had a multimeter. Just as well I remembered, the values are rather different.
Measuring on another PCE, I get 6,100 for R137 and 8,260 ohms for R138. With 3 band resistors they have a tolerance of 20% apparantly, so that means I can use a 6.2k and an 8.2k in there.
Not sure about the wattage.