Russian Bale Seal, Riga Flax?

Cloth Seal, Crossed Keys, Image & Found by Amber.
Found in the Durham region.

The obverse shows crossed keys with a cross above between the key blades. The reverse is blank. Differs from other similar crossed keys seals in having a flax? motif curved either side of the keys with staggered spikes projecting out.

See Fig.81 p.63, John Sullivan, 'Russian Cloth Seals in Britain Trade, Textiles and Origins', 2012, "Riga seals connected with the flax trade have been recovered in substantial numbers ... but ... have not been properly identified ... Their distinctive characteristic is their motif, derived from the Arms of the town of Riga: ... on the lead seals recovered in Britain, which on one side are usually blank, only ... the Cross Keys and the Cross which stands below the open crown [are shown]. In addition, between the heads of the two keys stands a number indicating the quality of the goods inspected (1, 2 or 3), number 1 being the most frequently recorded." p.48.

Geoff Egan,'Lead cloth seals and related items in the B.M. (B.M.occ.papers 93)' see No.264, Fig.34, "Presumably some kind of clothiers' or weavers' seal rather than a corporate issue. The keys are in a different style from those on known Leiden seals." From the picture in the BM catalogue this could easily be confused with one of these Riga bale seals but from examination of the original it is clearly a cloth seal and not a bulla type seal.

From Ged Dodd, "An interesting Crossed Keys flax seal found by Amber at Durham.
The keys are missing the Riga + between the keys and is replaced by a symbol ф (F) which could mean flax ..especially as the line around the seal looks like a flowerless flax stem .. but is the seal from Riga .. probably but not certain, no + .
Again there is no grading number .. a sure indication of flax.
The reverse is presumably blank .. as normal.
see ref IDS 1191 on The PeaceHavens Project, Seal Numbers 1101 - 1200"