As one of the seven Departmental stamps printed from a 200 subject plate, I cannot tell if this Imprint capture is position 5L, 5R, 6L, or 6R as the inprint was placed above and below the center of each half of the sheet.
The other variety that this stamp displays is the kiss of the overprint. It is unusual as most kisses show on top of the overprint, this one is under the overprint. It shows strongly under the S, lightly under the I and again strongly under the second E and the N. I have to wonder why the other letters didn't leave a trace. Was it a double kiss? the kiss left by the S very closely matches the uninked spot in the bottom of the S.