Replacement Bulb for Clock in W113

[Delvis]

Hello everyone, first post to the group...awesome information and very helpful. I am starting to rehab the interior of new to me 280sl. i need help pointing me to a source of a replacement light bulb for 1970 280SL clock. the clock is original kienzle , part number 113 542 01 11. need to locate a source for the 12v 2w lamp that goes in the socket. see attached picture. any information on bulb vendor part number or internet source would be great.

thank you in advance. DW

[Tyler S]

DW, Have a look at this page. They have every bulb these cars use.
http://www.authenticclassics.com/230SL-250SL-280SL-Convertible-113-Chassis-s/1.htm?searching=Y&sort=13&cat=1&show=32&page=1&search=%20Bulb

[Delvis]

Hi Tyler

thank you for the direction. much appreciated.

have a great weekend.

DW

[mnahon]

This may help:
http://www.sl113.org/wiki/Electrical/Clock#Lightbulb

[Delvis]

Merci beaucoup!

[pj]

I keep wanting to hunt around and see if someone offers a gentle LED solution to the lamp in the clock. I have been too busy the past months even to look at the notes I made last time LEDs were mentioned in a thread here. So I may as well just ask again if anyone has used an LED in their clock?

[Tyler S]

Peter, because of the way the bulb mounts into the socket from the back side, finding an LED with a flush head like the original glass bulb may be a task. Most LED's with the BA9S base have a larger head that wont fit into the socket. You would need something like in the link below. I dont know if that listing of 1.5w is an incandescent equivalent or actual draw.

http://m.miniinthebox.com/en/ba9s-1-5w-4x5730smd-27lm-6000k-cool-white-light-led-bulb-for-car-12v-2-pcs_p1040616.html?currency=USD&litb_from=paid_adwords_shopping&utm_source=google_shopping&utm_medium=cpc&adword_mt=&adword_ct=94820768761&adword_kw=&adword_pos=1o1&adword_pl=&adword_net=g&adword_tar=&adw_src_id=1364803665_349705201_21756095401_pla-111937587915&gclid=COLtq6716MsCFZWFaQodmwUAUQ

[mmizesko]

PJ,

I took the LED BA9S  (single white) and ground it down on a wheel, including the flange of the base.  Ruined the first one, but the second one fit fine.  So it can work.  Still pretty dim though, but better than the 2w incadescent.

Mike Mizesko

[pj]

Tyler and Mike, you are both referring to BA9S bulbs, yet the Technical Manual
-- Which I trust implicitly    --
says BA7S. And it says the width of the bulb is 7mm. After a bit of poking around at various sources, it also seems to have "wings" on it rather than bayonets.

Since I happen to have my clock (partly) disassembled, I took my vernier caliper and measured the bulb. It's 9mm exactly wide by 20mm tall, plus or minus a half a millimeter because I didn't want to squeeze the glass too hard. And it fits snugly in the cavity in the clock. This bulb has printed on it: 12913 PHILIPS 12V 2W [squiggly line] K5614, which I had no problem finding on many web pages. Authentic Classics, for one, seems to have the incandescent version.

The bulb in Tyler's link is 3cm long, which is probably too long for the clock, don't you think? It looks like most BA9S bulbs are intended for sockets where you push the bulb in from the front and there's plenty of open space in front of the socket so it wouldn't matter how much wider than 9mm or longer than 20mm the glass would be.

The website www.superbrightleds.com which has been mentioned in connection with the topic of LED bulbs, has BA9S listed, but most seem too long and too bright for our clock. Maybe this one? www.superbrightleds.com/moreinfo/ba9s-ba7s/ba9s-led-bulb-1-led-ba9s-retrofit-car/3/

[66andBlue]

Peter,
the Technical Manual is indeed correct, the clock needs a BA7s bulb.

{Error corrected on June 25, 2021: https://www.sl113.org/wiki/Electrical/Clock }

There is a BA7s LED bulb available: https://www.superbrightleds.com/cat/ba9s-ba7s/filter/Base_Type,BA7S,1,455:
but I tried it and it is weaker than the original 2W incandescent bulb.
There is a 4W incandescent BA7s available: http://www.ebay.com/itm/262355434546
which I have not tried.
The BA9s and BA7s standard bulbs have the same length but a different base diameter and the former is rotated into the socket while the latter slides in without rotation or twisting.

Andy Wolff added a 1-LED BA9s into his Quartz clock but that one has a different BA7s BA9s bulb holder and the hole in which the bulb sits is bigger.