FJ just posted:
"It is officially called a marker.. it does not match the internal 727 one on the emergency door.
PMA Details BOEING BAC27DPA152
Part Number: 1397VRW
Part Name: Marker-”Emergency Exit Handle”
Replaced Part Number: Boeing BAC27DPA152
Approval basis: Identicality per FAR § 21.303(c)(4)
Models: Boeing (707, 727, 737 series)