Sekonic MULTIMASTER L-408 Operating Instructions Manual page 7

When the flash is fired, this mark appears and the measurement times are
acccumulated. More than 10 measurement causes the "E" (error) mark to
appear.
See Pages 15 and 18.
IS0 film speed
Analog display
The film speed of IS0 3 to 8000 is shown.
See Page 8.
Measuring-level adjustment
This mark appears when the measuring-level
adjustment is carried out. See Page 20.
M
Shutter speed in minutes
Shutter speed in seconds
Number of frames per second
Shown during exposure index correction.
See Page 20.
The analog display can be switched to memory dot
display using the memory function.
See Page 12.