Harold, my comments from this thread: https://www.stovebolt.com/ubbthread..._Volt_Flasher_Unit_Info.html#Post1151612

I used a 535 flasher from NAPA (made in China), the flashers were fast, like a bulb was out...not the case though. Also the flasher did not make a perceptible clicking noise even though it is billed as a thermal unit and not one of the newer generation electronic flasher units.

I found a NOS Tung Sol 6V 535 flasher made in the USA on ebay and picked it up for around $15 delivered.

Good news, the flashers now flash at a reasonable rate and its easy to hear the good old fashion Click-a Click-a of old.

So, my advise is to consider something other than the NAPA 535 for your 6 volt flasher needs.

Added in edit; found a couple on Ebay best price is this one, http://www.ebay.com/itm/VINTAGE-TUNG-SOL-HEAVY-DUTY-NO-535-6V-FLASHER-NOS-F66-/302218307974?hash=item465d9d6986:g:oT8AAOSwa~BYa~1N

Last edited by moparguy; 02/08/2017 4:53 PM.
RonR


1951 3600 with Clark flatbed, T5, 4.10 rear
1970 340 Duster
1990 5.0 V8 Miata (1990 Mustang Gt Drivetrain)
1964 CJ5