Early booklets

Hi folks. I'm new here. Trying to find Scott numbers for this and other early booklets. I've tried searching for "BK1" then going up from there. The first result I got was "BK14" but it's not the first booklet. BTW, I don't have the pictured booklet, I found the picture by searching on Google for "first US postage stamp booklet 1900" but I couldn't find the Scott#. Any help is appreciated. Also any sellers specializing in booklets?
Thank you.
Comments
https://www.hipstamp.com/search?keywords=BOOKLET&parent_id=12&item_specifics_03_stamp_type[]=booklets-air-mail|booklets|booklets-cover&item_specifics_07_year_of_issue[from]=1900&item_specifics_07_year_of_issue[to]=1910
Gives 6 results, try varying the year range to find others
I believe BK14 is Scott 319 2 cent Carmine Type 1 in various shades from Scott US Specialized Catalog
Looks like BK1 was for Scott 279 cost 25 cents containing 24 cents worth of stamps
Mike
John
As a famous person once said "There are no stupid Questions, only stupid Answers!" (Million dollar Baby)
Folks here are always pitching in to quickly answer a wide variety of questions
In ordinary times, I would've suggested going to the largest branch of your local library, where many carry not only the 6- (or now 12-) volume Scott set but also the US Specialized. I appreciate that your options for that may be limited for the time being, but perhaps you live in an area where the libraries are open. (They are not where I am.)
I just now checked, and the person who literally breaks down Scott catalogs into their respective country sets does not do that for the US Specialized, as best I can tell. If he did, I was going to suggest getting those. Otherwise, Scott catalogs just a little out of date often sell for an attractive price on eBay. (Maybe here on HipStamp, too.) It might be worth getting.