The Mishnah lists objects that must be announced (e.g., a garment, an animal, money in a vessel) and those the finder may keep (scattered produce, scattered coins), based on whether they have a siman (identifying mark) and whether the owner likely despaired.
אֵלּוּ מְצִיאוֹת שֶׁלּוֹ, וְאֵלּוּ חַיָּב לְהַכְרִיז. אֵלּוּ מְצִיאוֹת שֶׁלּוֹ, מָצָא פֵרוֹת מְפֻזָּרִין, מָעוֹת מְפֻזָּרוֹת, כְּרִיכוֹת בִּרְשׁוּת הָרַבִּים, וְעִגּוּלֵי דְבֵלָה, כִּכָּרוֹת שֶׁל נַחְתּוֹם, מַחֲרוֹזוֹת שֶׁל דָּגִים, וַחֲתִיכוֹת שֶׁל בָּשָׂר, וְגִזֵּי צֶמֶר הַבָּאוֹת מִמְּדִינָתָן, וַאֲנִיצֵי פִשְׁתָּן, וּלְשׁוֹנוֹת שֶׁל אַרְגָּמָן, הֲרֵי אֵלּוּ שֶׁלּוֹ, דִּבְרֵי רַבִּי מֵאִיר. רַבִּי יְהוּדָה אוֹמֵר, כָּל שֶׁיֶּשׁ בּוֹ שִׁנּוּי, חַיָּב לְהַכְרִיז. כֵּיצַד. מָצָא עִגּוּל וּבְתוֹכוֹ חֶרֶס, כִּכָּר וּבְתוֹכוֹ מָעוֹת. רַבִּי שִׁמְעוֹן בֶּן אֶלְעָזָר אוֹמֵר, כָּל כְּלֵי אֶנְפּוֹרְיָא אֵינוֹ חַיָּב לְהַכְרִיז: וְאֵלוּ חַיָּב לְהַכְרִיז, מָצָא פֵרוֹת בִּכְלִי אוֹ כְלִי כְּמוֹת שֶׁהוּא, מָעוֹת בְּכִיס אוֹ כִיס כְּמוֹת שֶׁהוּא, צִבּוּרֵי פֵרוֹת, צִבּוּרֵי מָעוֹת, שְׁלשָׁה מַטְבְּעוֹת זֶה עַל גַּב זֶה, כְּרִיכוֹת בִּרְשׁוּת הַיָּחִיד, וְכִכָּרוֹת שֶׁל בַּעַל הַבַּיִת, וְגִזֵּי צֶמֶר הַלְּקוּחוֹת מִבֵּית הָאֻמָּן, כַּדֵּי יַיִן וְכַדֵּי שֶׁמֶן, הֲרֵי אֵלּוּ חַיָּב לְהַכְרִיז:
In a case where one discovers lost items, which found items belong to him, and for which items is one obligated to proclaim his find so that the owner of the lost items can come and reclaim them? These found items belong to him: If one found scattered produce, scattered coins, bundles of grain in a public area, round cakes of pressed figs, baker’s loaves, strings of fish, cuts of meat, unprocessed wool fleeces that are taken from their state of origin directly after shearing, bound flax stalks, or bound strips of combed purple wool, these belong to him, as they have no distinguishing marks that would enable their owners to claim them. This is the statement of Rabbi Meir. Rabbi Yehuda says: If one finds any lost item in which there is an alteration, he is obligated to proclaim his find. How so? If he found a round cake of pressed figs with an earthenware shard inside it or a loaf of bread with coins inside it, he is obligated to proclaim his find, as perhaps the owner of the item inserted them as a distinguishing mark by means of which he could reclaim his property in case it became lost. Rabbi Shimon ben Elazar says: If one finds any anpurya vessels, since their shape is uniform and they are indistinguishable, he is not obligated to proclaim his find. And for these found items, one is obligated to proclaim his find: If one found produce inside a vessel, or a vessel by itself; coins inside a pouch, or a pouch by itself; piles of produce; piles of coins, three coins stacked one atop another; bundles of grain in a secluded area; loaves of a homeowner, as each shapes his loaves in his own unique manner; wool fleeces that are taken from the house of a craftsman, as each craftsman processes the wool in his own unique manner; jugs of wine; or jugs of oil. If one finds any of these, he is obligated to proclaim his find.