The original Panasonic SD-251 from the late 1990s/early 2000
 
It is the exact matching component used for your SD-251 model.
 
Genuine Panasonic Breadmaker Measuring Spoon – Fits SD-251
 
That is a genuine Panasonic Breadmaker dual-use measuring spoon, which is included as an accessory with the Panasonic SD-251 breadmaker. 
 
Because exact measurements are critical for bread recipes to rise properly, using a non-standard spoon can throw off your yeast, salt, or sugar ratios. 
 
1 teaspoon and 1 tablespoon portions. 
 
Genuine OEM part. Has some cosmetic discolouration/staining from normal kitchen use as pictured, but is thoroughly cleaned, sanitised, and fully functional.
 
 
 Brand: Panasonic
 
Model: SD-251
 
Marked. As shown in the photos.
 
It measures 11.1cm in length, 3.3cm in maximum width and 2.2cm in height.