What Ink Pen Did Lovecraft Prefer?

Here is a nice note from HPL about a shopping trip he and Sonia took ...

"You'll recall that I obtained a pen apiece for SH (Sonia) & myself last October at a price of $1.28 ... we found the sale still on {&} the salesman still willing to make exchanges. ...to obtain real satisfaction one must invest in a real Waterman ... I did not escape from the emporium till a $6.25 Waterman reposed in my pocket - a modern self-filler corresponding to the ancient $6.00 type which I bought in 1906 & lost seventeen years later amidst the sands of Marblehead in the summer of 1923 ... the feed is certainly a relief after sundry makeshifts - tho' I think I'll change this especial model tomorrow for one with a slightly coarser point - one less likely to scratch on rough paper. It is certainly good to be back among the Watermans again ..."

Letter of 30 January 1926 to Lillian Clark, p. 276-277, Letters From New York, Joshi & Schultz, 2005.