/v/ > [b] and /b/ > [ß]

In intervocalic position [b] occasionally turns up as a realization of /v/ and [ß] for /b/. Slight evidence that this may have been more common historical process is suggested by two examples. One informant identified a breed of duck as a scoby (from Muscovy). Conversely, two other elderly informants, talking of their work in the now defunct flax mills, enunciated the /b/ in ‘fibre’ as a bilabial fricative [ß]. It appears that this articulation of /b/ is not productive, and is limited to particular words.