The Scott-listed T13a double transfer has been in the catalogue (and partially shown) for many, many years. What I never realized until about 11 years ago was that there are actually 3 plate positions associated with this double transfer.

The stamps immediately above and below the full T13a also exhibit doubling:

1. Plate position 133 (the stamp above the full T13a) only shows doubled elements at the bottom of the stamp
2. Plate position 147 (the full T13a showing doubling of both top and bottom elements)
3. Plate position 161 (the stamp below the full T13a) only shows doubled elements at the top of the stamp.

All 3 positions have been listed in the Scott Specialized Catalogue since the 2019 edition.

As far as I’ve been able to determine, no intact multiples of the complete strip of 3 have been found (or at least reported).

However, I’ve been able to come about as close as you can get. I have been able to acquire two different multiples featuring the T13a double transfer, one with the full T13a and the stamp above, and the other with the full T13a and the stamp below.

Interestingly, both are still on document or item.

The first one is a CDV (Carte de Visite) acquired from Bruce Baryla in 2013 when he broke down his “Civil War Sun Tax” exhibit. This CDV has three R13c affixed, including a vertical pair containing position 147 (the full T13a) and position 161 below it (doubled top elements only).

The second item is from the document balance lot from Siegel’s sale of Brian Bleckwenn’s collection, that I was able to acquire courtesy of Mike Mahler, who purchased the lot.

It is a vertical strip of 3 of R13c paying six cents tax (the correct rate) on an 1864 San Francisco promissory note. The bottom 2 stamps in the strip are position 133 (doubled bottom elements only) and position 147 (the full T13a).

This document is doubly in my wheelhouse, as the use of R13c on document is an improper use.

The cancel is an interesting crude rimless circle “CANCELED” handstamp in red.

Here is a superimposed image of all 3 positions (the documents were scanned about 15 years apart on different scanners; that plus paper shrinkage/expansion is the reason the center portion showing both full T13a is out of focus).

I also have a horizontal pair with the stamp at right being a bit clearer copy of the top position 133 (by far the weakest of the three plate positions).

Interestingly, the image to the left (plate position 132) also shows some doubled elements at top right and bottom right… who knows what other things might have been on that complete plate.