moving into 1935, there was a flourish of new designs amounting to ten in January alone, and looking at the photos sent to the BoT, many of these show what appear to be examples made in plaster, which is likely to suggest these were models created by M. Franckhauser. The only exception to this looks to have been the first entry which is the honey jar - catalogue No. 2592 - as below, and Baker & Crowe don't include this item as having a Franckhauser connection.
The original factory photo used in Jobling's glossy catalogue shows an example of this pattern, in amber, together with an under tray and spoon. I can't find either the tray or spoon in the Kew archive pix relating to this Registration.
Reading the text to the factory catalogue, the tray and spoon are listed separately - eight old pennies if you wanted the spoon alone - and both the spoon and tray are given the single catalogue No. 2610. Baker & Crowe list this catalogue No. for the spoon and tray as one of the seventeen items in the Jobling catalogues for which a Registration No. remains unknown.
Not so sure you'd instinctively call this container a 'jar', but a jar is certainly the factory's terminology.