A pair of Stanomin-type anklets (Fig. 1) was discovered in the south-western part of the village of Siwianka, Otwock County, in a meadow area descending gently towards Lake Brodek (Figs. 2, 3). The artefacts were deposited in a dry environment, as indicated by the noble patina covering them.

The anklets, almost identical in size and of similar weight, are quite tightly coiled in opposite directions, in 1⅓ coils, and made from a round rod of approx. 53 cm in length, with maximum thickness of 1.3 cm, tapering towards knob-shaped terminals, one of which is bevelled on the inside (Figs. 4, 6). An ornament of narrow grooves covering the entire outer surface of the ornaments, with many imperfections (Fig. 8), was made in a casting mould using the lost-wax method, as confirmed by the absence of casting seams on the rods and the presence of defects in the form of depressions overlying the ornamentation (Fig. 5). The anklets were cast from tin bronzes with similar shares of the main alloying elements (Table 1).

The Siwianka anklets correspond to tightly coiled specimens of the classic type of the Mazovian version in the classification of Małgorzata Mogielnicka-Urban and to specimens of type Vb1 as defined by Marcin Maciejewski, i.e., symmetrical forms, with knobbed terminals decorated with a continuous Mazovian ornament, among which more than half contain the motif of hatched triangles (Fig. 12:a–h). Specimens decorated like the Siwianka artefact, with a strongly geometric pattern of pairs of hatched hourglasses composed of triangles touching at the vertices (Fig. 12:a.b), are concentrated in eastern Mazovia (Fig. 11). Podlachian anklets were usually decorated with rhombus arrangements between spaced hatched (Fig.12:h) and, less frequently, plain triangles (Fig.12:i–k). A small number of anklets decorated with other patterns of hatched triangles have been recorded both in eastern Mazovia and Podlachia and in western Mazovia (Fig.12:e–g), occasionally also beyond the Mazovian-Podlachian zone (Fig.12:c.d). Ornaments whose basic motifs are groups of diagonal grooves – touching (Fig. 12:m) and spaced (Fig. 12:n–r) – did not catch on in eastern Mazovia and Podlachia, nor did diagonal crosses (Fig. 12:s) or ‘ladder’ arrangements (Fig. 12:t). The decorative elements of the anklets were probably inspired by ornamentation of vessels. Concentrations of similarly decorated anklets in western and eastern Mazovia and Podlachia (Fig. 11) may be evidence of the functioning of local bronze-manufacturing workshops, which adhered to specific designs. Commonly found anklets – either on their own or in multi-part hoards – point to a surplus in local bronze manufacture, albeit directed primarily to the local market (Fig. 12). Almost all anklets found east of the Vistula River are wound in 1⅓ coils, which differs from the mostly 11/2-coil specimens from western Mazovia and specimens of the Kuyavian version. The latter form a cluster on the Lower Pilica River (Fig. 10), testifying to the influence of the Kuyavian metallurgical centre, also manifested in the spread of specific ornamental motifs (Figs. 11, 12:p.r). The influence of the Kuyavian centre also reached Podlachia (Fig. 10). The spread of items and ornamental patterns from Kuyavia towards the east and south-east was most probably caused by the loss of previous recipients, both as a result of the expansion of Pomeranian Culture settlement in Greater Poland and the unrest caused by Scythian invasions.

The hoards from the Mazovian-Podlachian zone containing anklets are devoid of chronological markers that would allow their more precise dating within the confines of Hallstatt Period D. The hoards from Ginetówka, Grójec County, Kisielsk, Łuków County, Rze­szotków, Siedlce County, and Otwock-Teklin, due to the presence of beads made of glass paste rather than faience, may have been deposited at the earliest in the late phase of Hallstatt Period D (phase HaD2 according to Tomasz Purowski). The assemblage from Bąków Dolny, Łowicz County, is attributed to the end of Hallstatt Period D or the beginning of the early Pre-Roman Period (the beginning of the La Tène Period in Jan Michalski’s dating). A brooch with a decorative foot from Łuszkowo, Kościan County, sets the terminus ante quem of the deposition of the hoard to the beginning of the early Pre-Roman Period (phase A of the early La Tène Period acc. to Zenon Woźniak). The dating presented here indicates that the Stanomin-type anklets, both the Kuyavian and the Mazovian versions, remained in circulation for a long time.