The pedals on my 1898 Humber Light Roadster are actually BSA. As you can see (above), they are illustrated in the 1898 BSA Fittings catalogue. (Those pictured in the 1897 & 1899 BSA catalogues are different). I’m not sure if Humber bought them from BSA to fit to their own bicycles. They are ‘No 4’ in the chart at the top of the page.
1898 HUMBER CATALOGUE EXTRACT
The 1898 Humber pedal is similar. I wonder if Humber bought them from BSA?