Sorry for being so prolific with my questions. Been sorting out a pile of precancels and I have another odd one. This coil seems to be PSS 162. If it was a 151 or a 153 it would probably have serifs on the letters. This one appears not to have serifs. I have an older T & T Catalog (fifth edition) so I don't know if it was updated in later catalogs but here it is.