Princeton 6G2

I am getting ready to build a 6G2, and have been reviewing schematics, layouts, and photos.

One of the photos I found here shows an Astron cap can with 20uF/20uF/20uF even though the schematic says that they are 30uF.

So I am wondering if this was just a replacement, or an uncommon factory cap can, or maybe quite common.

So, if you have a 6G2 or a 6G2a, please take a look at your cap can, and let me know if it is three 20's or three 30's (or something else). Consider this a survey - the more responses I get, the better since the trend is really what I am looking for.

Please mention year, and color (black or brown) as this might be part of the story too.

Thanks,
Steve

you will want to post this in the other amp discussion forum.
wally is knowledgable about the brown princeton circuit as are a few others.