Under dash reverse indicator (what bulb is used?)

[ffgreg32]

I have a 1970 Sport Satellite with 4 speed pistol grip. It has the under dash reverse indicator that lights up when in reverse. What number bulb is required in the assembly? Thanks in advance.

 

[66383]

# 53 I believe.

 

[70gtx440dana]

69 bulb chart shows # 53

 

[ffgreg32]

69 bulb chart shows # 53

View attachment 1122460

Thanks all!